All settings wired and persistent
Cleanup non Airmap builds

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

This reverts commit 52160d80.

Just use settings defaults

Instead of hardcoded "QGroundContorl" strings

No more user prompting

Convert bool settings to SettingsFact

* Holds all the settings for the app
* Allows core plugin to override default values

- Shot Interval in Survey
- Much change to time/distance calc