macOS: Moving editor window has inconsistent behavior depending on how it is dragged

[Grublady]

Tested versions

Latest 4.3 master branch

System information

Godot v4.3.beta (fe11def75) - macOS 15.0.0 - Vulkan (Mobile) - integrated Apple M1 Max - Apple M1 Max (10 Threads)

Issue description

Dragging the editor window seems to be handled sometimes by Godot and sometimes by macOS, yielding inconsistent behavior.

Behavior when Godot handles moving the window:

• While moving between screens, the window appears fully on whichever screen contains its midpoint, and not at all on the other
• The window does not participate in certain system windowing features, such as dragging beyond the top of the screen to access Mission Control

Behavior when macOS handles moving the window:

• While moving between screens, the window appears fully on whichever screen contains the mouse pointer, and appears with some opacity on the other
• The window participates in typical system windowing features
• The rapid movement described in macOS: Dragging editor between screens sometimes causes the window to move erratically #93955 is not observed

Circumstances

Godot seems to handle moving the window unless:

• Dragging the window by an edge
• Dragging the title bar while newly moving focus to the editor window (this may be related to macOS: editor requires a click to activate the window before accepting any UI interactions #86904)
• Dragging by the title bar with interface/editor/expand_to_title disabled
• Dragging certain non-editor windows, such as the About panel

Screen.Recording.2024-07-04.at.16.08.29.mp4

(This recording shows only the left screen; when the editor window disappears, it is on the second screen)

Steps to reproduce

• Open the Godot editor
• Set interface/editor/expand_to_title:
  • If enabled, Godot handles the window
  • If disabled, macOS handles the window
• Move the editor window by dragging the title bar
• Drag between displays, or beyond the top of the screen

Minimal reproduction project (MRP)

N/A

[Grublady]

Closing as fixed by #99642