[Update] Heightmap selection screen (v1.84) (Patreon)

Today's update introducing a new screen. The screen allows to select one of the available templates or pre-created heightmaps proving a nice visual representation. Now you can see the heightmap that is going to be generated. You can also regenerate the preview to find a one you like and get understanding what template is about.

I have also updated older dialogs to be somehow used on mobile and generally tried to improve mobile experience. The tool is still barely usable on touch devices, but at least it's some minor progress.