Setting a keybinding to <None> does not save

[freddiehaddad]

Describe the bug When setting a keybind to <None>, the change isn't saving.

To Reproduce Steps to reproduce the behavior:

1. Open Fancy WM
2. Click Keybindings
3. Click inside any keybind text box
4. Click the X to set it to <None>
5. Navigate to another settings tab
6. Navigate back to Keybindings
7. Observe that the unset keybind has been restored to the default.

Expected behavior I would expect that unsetting a keybind will be saved.

Desktop (please complete the following information):

• OS: Windows 11
• OS Build: 22631.4169
• FancyWM Version: 2.140.0