GdkWin32: precalculate keymap at display opening
The default keymap and keymap layouts are calculated on first get_keymap
request.
If done after a GdkSurface is setup and started listening at win32 events, we may then enter in a recursive loop.
To avoid this, precalculate the keymap as soon as GdkDisplays are open.
Fixes #6203 (closed)
Closes #6203 (closed)
Edited by gwillems