When setting keyboard shortcuts, existing Rectangle shortcuts continue to have effect

[finite-state-machine]

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macOS version: 10.14.6 (18G103) Rectangle version: v0.31 (36)

When setting keyboard shortcuts, shortcuts which are already assigned continue to have effect, interfering with the shortcut selection process.

A user new to Rectangle attempts to assign a keyboard shortcut which happens to conflict with one of Rectangle's default shortcuts:

1. The user opens the Rectangle preferences pane and selects the shortcuts tab.
2. S/he clicks the shortcut box next to one of Rectangle's actions.
3. S/he then presses a key combination which happens to already be assigned (by default) to some other action.

Expected behaviour: show a message about a conflicting choice of shortcuts (and perhaps ask the user if they want to override the existing shortcut.)

Actual behaviour: the Rectangle preferences window jumps around in unexpected ways. Rectangle continues to prompt the user to select a shortcut.

On a personal note, thanks for a brilliant piece of software! I hope this bug report will prove useful.

logs (showing that the preferences window was moved, rather than assigning the shortcut as expected): 2020-07-19T10:57:23-04:00: AX sizing proposed: (697.0, 433.0), result: (697.0, 433.0) 2020-07-19T10:57:23-04:00: AX position proposed: (1572.0, 835.0), result: (1572.0, 835.0) 2020-07-19T10:57:23-04:00: AX sizing proposed: (697.0, 433.0), result: (697.0, 433.0) 2020-07-19T10:57:23-04:00: center | display: (0.0, 80.0, 3840.0, 2057.0), calculatedRect: (1572.0, 835.0, 697.0, 433.0), resultRect: (1572.0, 835.0, 697.0, 433.0)

[erikhuizinga]

Any existing keyboard shortcut being pressed should indeed be ignored:

1. Ignore the window change behaviour (if any, not all always have a visible effect).
2. Notify the user that the shortcut is already assigned to another action.

Optionally, the user might want to unset the existing binding in the process.