…d saves preventing industry creation.

As the information is always available from the tree ground type, unconditionally
update the map array for tree tiles.

…tiplayer, or with shift pressed."

This reverts commit b1e40b6.

This is a fix for a patch that will be reverted in the next commit.

This reverts commit 011257d.

This commit was not working properly. Attempts are made to fix it,
but so close to 1.9, it sounds a lot better to revert it from the
1.9 branch, and keep developing it further in 1.10.