Add Arctis Nova Pro Omni support - #49
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This PR adds support for the Arctis Nova Pro Omni along with some fixes for the GUI that prevented rendering device settings.
The first fix was a race condition where the incorrect cached dbus proxy could be used leading to an exception that was logged and swallowed.
The second fix is directly related to the sheer number of configuration options of the Omni. This fix adds a scroll area so the setting widgets can scroll instead of collapsing to 0-height and appearing to not render.
I have been able to verify that all settings exposed for this headset appear to work. I don't have any other Arctis headsets available to test with, so I can't verify if this change causes problems with those devices.
AI Disclaimer: I did leverage AI (Codex, gpt-5.6-terra) to help discover the device HID protocol and to implement the change in this PR. I have fully reviewed and tested these changes on my local machine.
Edit: I noticed that there was a cleaner way to render the various time selections that showed up for screen saver timeout and bluetooth auto-off time, and converted those to a drop-down, which also fixed an issue with a horizontal scrollbar showing up in the Device panel.