OS: Windows 10 - 64-bit
Default F12 Settings shortcut key missing after going to the Settings panel, selecting Interface section or subsection and clicking OK in the Settings panel.
Effect: Default F12 Settings shortcut key missing after going to the Settings panel, selecting Interface section or subsection and clicking OK in the Settings panel.
To reproduce:
1. with a freshly opened XNviewer Browser, click on Tools menu and make note that the Settings F12 key is visible, click anywhere to dismiss the menu.
2. press F12 to bring up the Settings panel.
3. click on "Interface" top section or subsection, click OK or press the Enter key to close the Settings panel (important to OK close the panel for this bug to appear)
4. press F12 now, notice that it has no effect, click Tools menu and make note that the Settings F12 key is now missing.
Actual behaviour (bug): Default F12 key missing after visiting Interface Settings and OK confirm close panel

Expected behaviour: Default F12 key should not go missing.
Also the Settings F12 key should be made user configurable in the keyboard shortcuts section. Thanks.