Move all airmap related stuff to its own directory

Moved "Grid Lines" out of General Options and into the Video Stream Widget
Made a QGC custom Switch element

Added AirMap settings (SettingsGroup)
Added AirMap settings block to General Settings
Create macros to deal with the tedious repetitions within SettingsGroup
Removed old, hacked in setting for AirMapKey
Remove a few of the tons of build warnings

Converted Structure Scan to use CameraCalc such that it now works with
camera specs.

Also rename QmlPageInfo to QmlComponentInfo to cover more use cases

Used to display items associated with Flight Plan on Map