Version of OpenTTD

1.11.1

Expected result

You should be able to zoom further in when the minimap is at 1x scale. Ideally a 2x and 4x scale should be provided (just like in the main viewport).

Actual result

You are unable to zoom further in when the minimap is at 1x scale. This can result in players on big screens not being able to see as enough detail as they want, especially concerning #9167 and similar issues.

Steps to reproduce

1. Start the game on a 1080p screen or higher.
2. Create a new world.
3. Open the minimap.
4. Try to zoom in.
5. Notice that you can't zoom in further than 1x scale.