properties-window: Set minimum size for the properties window
The properties window can be shrunk to a size that heavily truncates everything inside the window. Set a minimum size of 360x294px to fix that.
Screencast_from_2023-08-25_19-14-57
Reference: https://developer.gnome.org/hig/guidelines/adaptive.html
Fixes #3075 (closed)
Edited by Automeris naranja