Fix startup crash on initial font change signalling qgc reboot required

Keep track of recording time if camera doesn't provide it.
Make sure camera info is received (if camera ACKs the request)
Keep track of camera's heartbeat. Remove camera if not heard from after a while.
Update MAVLink

AltMode visual tweaks

Default abort alt = 0. This works around problems between multi-rotor and fixed wing.

Fix jscript complaint

Only use small font on mobile

Add "known" parameters to camera controller.

Size/Position fixes

Alt Mode: Wording changes, checkmarked menu

Altitude Mode terminology cleanup

Better mobile visuals

Visual cleanup

Remove qDebug

Newer version to support containsPress

Better sizing when closed

Hamburger color fixes

Visual cleanup

Radius to 1 decimalPlaces

Simpler control design for better mobile display

Add note about button bits

This reverts commit c01ceadd.

Don't send button pressed bits to MANUAL_CONTROL

Remove deprecated button count testing

Remove the concept of reserved buttons for manual control

Expose complex item names in a way useful for custom builds

Updated MAVLink to handle video stream types (auto discovery)