english (us): 8 changes by 2TallTyler
estonian: 16 changes by siimsoni
korean: 5 changes by telk5093
italian: 32 changes by AlphaJack
german: 5 changes by Wuzzy2
danish: 15 changes by achton
lithuanian: 89 changes by devbotas
spanish: 3 changes by MontyMontana
french: 8 changes by arikover
portuguese (brazilian): 3 changes by Greavez
polish: 17 changes by yazalo, 2 changes by pAter-exe

swedish: 10 changes by kustridaren
norwegian (bokmal): 3 changes by buzzCraft
czech: 39 changes by PatrikSamuelTauchim
ukrainian: 4 changes by StepanIvasyn

estonian: 2 changes by siimsoni

swedish: 1 change by kustridaren
estonian: 1 change by siimsoni
russian: 5 changes by Ln-Wolf, 3 changes by SecretIdetity
ukrainian: 7 changes by StepanIvasyn
lithuanian: 31 changes by devbotas
portuguese: 54 changes by azulcosta

ukrainian: 10 changes by StepanIvasyn
portuguese: 78 changes by azulcosta

spanish (mexican): 8 changes by absay
ukrainian: 13 changes by StepanIvasyn
dutch: 3 changes by Afoklala
lithuanian: 1 change by devbotas

ukrainian: 1 change by StepanIvasyn

…ear back buffer. (OpenTTD#8877)

…ifferent signedness. (OpenTTD#8881)

vietnamese: 118 changes by KhoiCanDev
slovak: 13 changes by FuryPapaya

…tch on texture creation.

chinese (simplified): 2 changes by clzls
korean: 2 changes by telk5093
slovak: 9 changes by FuryPapaya
catalan: 4 changes by J0anJosep
polish: 4 changes by pAter-exe

slovak: 10 changes by FuryPapaya

arabic (egypt): 22 changes by AviationGamerX

slovak: 6 changes by FuryPapaya

This used to work by accident: originally the code checked if
GenerateWorld was threaded. If not, it would abort the function.
This worked for placing trees, because it was also returning false
when it was not active.

With the recent changes, that check got removed, and this crash
started to happen. So now check if we have a modal window, which
is a very solid indication we are generating the world.

… interface

chinese (traditional): 25 changes by SiderealArt
japanese: 81 changes by taku315

…is actually faster.

…es snow line height)

Setting the snow coverage (in % of the map) makes a lot more sense
to the human, while still allowing the niche player to set (by
finding the correct %) a snow line height they like. This makes for
easier defaults, as it decoupled terrain height from amount of snow.

Maps can never be 100% snow, as we do not have sprites for coastal
tiles.

Internally, this calculates the best snow line height to approach
this coverage as close as possible.

This is an indication value; the game tries to get as close as it
can, but due to the complex tropic rules, that is unlikely to be
exact.

In the end, it picks a height-level to base the desert/tropic
line on. This is strictly seen not needed, as we can convert any
tile to either. But it is the simplest way to get started with
this without redoing all related functions.

This setting influence the max heightlevel, and not as the name
suggests: the height of the generated map.

How ever you slice it, it is a very weird place to add this
setting, and it is better off being only in the settings menu.

Commits following this commit also make it more useful, so users
no longer have to care about it.

This better reflects what it is, and hopefully removes a bit of
the confusion people are having what this setting actually does.

Additionally, update the text on the setting to better inform
users what it is doing exactly, so they can make an educated
decision on how to change it.

Next commit will introduce an "auto" value, which should be the
new default. The rename has as added benefit that everyone will
start out on the "auto" value.

This opens up the true power of the TGP terrain generator, as it
is no longer constrainted by an arbitrary low map height limit,
especially for extreme terrain types.

In other words: on a 1kx1k map with "Alpinist" terrain type, the
map is now really hilly with default settings.

People can still manually limit the map height if they so wish,
and after the terrain generation the limit is stored in the
savegame as if the user set it.

Cheats still allow you to change this value.

It will add some slack to the map height limit if that was set
to auto.

At least, TGP will try to reach it. It heavily depends on the map
if it is reachable at all. But for sure it will do its atmost to
get there!

This allows us to later on see what someone did, and makes sure
that "restart" command still knows how the game was created.

…r of this value

Before this commit, it scaled to map-height-limit. Recently this
could also be set to "auto", meaning players don't really know
or care about this value.

This also means that if a player exported a heightmap and wanted
to import it again, looking like the exact same map, he did not
know what value for "highest peak" to use.

norwegian (bokmal): 28 changes by Anolitt
spanish (mexican): 29 changes by absay
galician: 1 change by JohnBoyFan
vietnamese: 30 changes by KhoiCanDev
estonian: 31 changes by siimsoni
czech: 6 changes by tomas-vl
arabic (egypt): 73 changes by AviationGamerX
hungarian: 37 changes by pnpBrumi
german: 24 changes by danidoedel, 4 changes by matthiasradde, 2 changes by SecretIdetity
russian: 2 changes by SecretIdetity
finnish: 40 changes by lanurmi
catalan: 47 changes by J0anJosep
lithuanian: 30 changes by devbotas
spanish: 29 changes by JohnBoyFan
french: 30 changes by MalaGaM
portuguese (brazilian): 7 changes by jpsl00, 5 changes by Greavez
polish: 31 changes by Milek7

swedish: 30 changes by kustridaren
spanish (mexican): 1 change by absay
japanese: 13 changes by Azusa257
vietnamese: 1 change by KhoiCanDev
estonian: 12 changes by siimsoni
czech: 6 changes by PatrikSamuelTauchim, 2 changes by tomas-vl
chinese (simplified): 88 changes by clzls
arabic (egypt): 16 changes by AviationGamerX
luxembourgish: 4 changes by phreeze83
korean: 34 changes by telk5093
italian: 16 changes by AlphaJack
german: 1 change by danidoedel, 1 change by Wuzzy2
slovak: 30 changes by FuryPapaya
catalan: 35 changes by J0anJosep
tamil: 16 changes by Aswn
dutch: 32 changes by Afoklala
portuguese (brazilian): 14 changes by Greavez, 5 changes by jpsl00

english (us): 7 changes by HAJDog247
czech: 18 changes by PatrikSamuelTauchim
luxembourgish: 99 changes by phreeze83
serbian: 4 changes by nkrs
catalan: 20 changes by J0anJosep
french: 1 change by arikover
portuguese: 30 changes by azulcosta

…n 0 (OpenTTD#8901)

english (us): 23 changes by 2TallTyler
luxembourgish: 63 changes by phreeze83
ukrainian: 72 changes by StepanIvasyn
catalan: 5 changes by J0anJosep
turkish: 5 changes by nullaf

…enTTD#8904)

luxembourgish: 1 change by phreeze83
serbian: 59 changes by nkrs

catalan: 2 changes by J0anJosep