Ben Wiederhake 2de471b9f0 WindowServer: Fix many subtle bugs in tiling/maximizing ...

- Unmaximization/untiling had nearly but not quite code duplication;
  this patch replaces the actual "regrabbing" logic with Rect::set_size_around.
- When undoing maximization/untiling, it used to be possible to to grab a window
  "outside" of its frame, and thus drag it off the screen. This is no longer
  possible. Fixes #4644.
- As a side effect, when untiling from the bottom/left/right, the regrab is now
  a much smoother experience.
- Setting the resize aspect ratio while being tiled now untiles and umaximizes
  the window, as these things are incompatible. Fixes an undocumented bug
  (steps to reproduce: maximize, then set aspect ratio).
- When unmaximizing, spurious WindowLeft events were sent, because that path
  didn't set hovered_window. Fixes an undocumented bug.

Since these things are interwoven, this is all a single commit.

2021-01-23 08:34:17 +01:00

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