Fix top position calculation when applying edge resistance.

[abebinder]

Related Issues

• Window Tiling: Cinnamon's native window tiling/snapping feature does not work as expected causes weird bug cinnamon#13342
• GNOME Applications on second display (split mode).  cinnamon#11219
• Resizing two "sticky" windows works incorrectly cinnamon#11169
• One tiled window needlessly resizes to unusable size when adjusting their horizontal sizes. cinnamon#12305

Summary

When resizing a right-side tiled window horizontally, the left position of the window changes as you resize it. The bug in apply_edge_resistance_to_each_side is deciding whether or not to apply an adjustment to the height of the window using the current left position of the window instead of the current top position of the window as it should. This leads to unwanted vertical height changes while resizing the window horizontally.

Before

2026-02-11.23-03-36-converted.mp4

After

2026-02-11.22-57-23-converted.mp4

[elduglas]

Thank you very much. Let's hope @clefebvre approves it so it can be included in the next release.