[Allow opening specified shortcuts when full screen. Also allow whitelist/blacklist behavior]

**Is your feature request related to a problem? Please describe.**

I have certain shortcuts that I'd like to be able to use in full screen applications, just not the main shortcut to activate it. For example I have win+h to swap between hgig, dynamic toning mapping off and dtm on. This is useful in games that have different hdr properties. on the other ctrl+space is really easy to hit while playing games. Another really useful shortcut while in games or other fullscreen applications is switching between speakers and headphones.

**Describe the solution you'd like**

A whitelist/blacklist option for shortcuts. For example in the Custom Query Hotkey modal where you enter the details, a checkbox to say if it's available in fullscreen options could allow it to pass through. The only shortcut that can be activated without first having activated flowlauncher is the one to activate the main window. So you could rename the option "Allow to activate launcher during full screen applications?" and have a checkbox per custom shortcut. For my use case, the only shortcut I'd actually want to deactivate is the main one as it's really easy to hit accidentally while gaming.