[Bug] Custom shortcuts for "Switch between open windows" don't auto-dismiss on modifier release

[thmsnhl]

The "Switch between open windows" shortcut only auto-dismisses the switcher and confirms the selection when the default Super+Tab binding is used. Any custom shortcut does not auto-dismiss — the user must explicitly click a window or use the number key assigned to it.

To reproduce

1. Open COSMIC Settings → Keyboard → Keyboard Shortcuts
2. Find "Switch between open windows" and set a custom shortcut (tested with Ctrl+Tab and Shift+F)
3. Press the shortcut — the switcher opens and highlights a window
4. Release the keys
5. The switcher remains open; no window switch occurs

Expected behavior

Releasing the modifier key (or the shortcut keys) should confirm the highlighted window and dismiss the switcher, consistent with the behavior of the default Super+Tab binding.

Actual behavior

The switcher stays open after releasing the keys. The only way to confirm a selection is to click a window or press the number assigned to it (e.g. Ctrl+1).

Additional context

The default Super+Tab shortcut works correctly — releasing Super immediately switches to the highlighted window.
This behavior appears to be hardcoded specifically for Super+Tab and is not applied to custom bindings.

• OS: Pop!_OS 24.04 LTS
• Desktop: COSMIC (Wayland)

[thmsnhl]

This does not belong into cosmic-comp, therefore I close the issue.