Fix for satellite windows being moved when the parent moves

[mattkae]

What's new?

This is a suggestion, but I think it is correct. Satellite windows should not move with their parent, right?

To test

• Fire up gimp with satellite windows
• Move the main window and note that the satellites don't move as well

[AlanGriffiths]

1. Gimp's satellites are not being identified as mir_window_type_satellite
2. Satellites are supposed to move with the parent

[AlanGriffiths]

1. Gimp's satellites are not being identified as mir_window_type_satellite

Oh, that's wrong

[codecov]

Codecov Report

Merging #3062 (8b443e8) into main (85bc5b0) will decrease coverage by 0.01%.
Report is 2 commits behind head on main.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #3062      +/-   ##
==========================================
- Coverage   77.69%   77.69%   -0.01%     
==========================================
  Files        1056     1056              
  Lines       73409    73411       +2     
==========================================
- Hits        57037    57036       -1     
- Misses      16372    16375       +3     

Files	Coverage Δ
src/miral/minimal_window_manager.cpp	63.21% <50.00%> (-0.10%)	⬇️

... and 5 files with indirect coverage changes

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[mattkae]

1. Gimp's satellites are not being identified as mir_window_type_satellite

   2. Satellites are supposed to move with the parent

Interesting that satellites are supposed to move with the parent. That doesn't seem to be the behavior that other compositors (e.g. mutter) gives to gimp's windows here. Would this mean that those windows are a different type of window (not-satellite)?