Add quickswap input options to inputs menu

[sanderpuh]

Simplified version of the quickswap input PR, this PR replaces the old #423.

Added 2 options to the dropdown menu on the inputs page: Toggle source and Cycle source
Added the remark 'Toggle source' will switch between HDZero and Expansion module
Everything can be set on the inputs page, without the need of defining which option you want to use on a separate page.

See Right short: and Right long: in the below example:

[nerdCopter]

i see it merged, but will still post.

• briefly tested "Toggle Source" -- worked as intended.
• regarding "white screen" for no input -- how does this affect the OLED screen health if left active for some time? is burn-in an issue? maybe this could be a black screen with moving text "No Input". Thoughts @ligenxxxx ?

My user experience:

• First bootup to set a button to "Toggle Source".
• Second bootup to test the button: worked as intended. no signal testing.
• Third bootup to fly: booted analog quad after booting goggle. Had a hard time locking onto the signal, including rolling signal, and a couple instances of white screen (white screens did not DVR record). I wiggled analog module but it was firm. Rebooted quad, finally after a few more attempts it locked in and i flew.
• Fourth boot: Locked onto analog instantly and i flew.

DVR of my experience, red screens indicates DVR file change. 1 minute of switching/etc before geting a good lock on analog. Also note end of video recording at 1080 on green as per Issue #208 (@4m17s)

• https://youtu.be/JrYVjZYzLt4

[sanderpuh]

Thank you for your feedback @nerdCopter - I don't recognize the experience. I'll have a look though, perhaps I can find something off.