Better handling of vehicle change state transitions

Add mutex for _sessionTargets access. Remove range_for usage. General cleanup

Cleanup duplicated magic numbers in joystick code

Fix Flow custom flash

Horizontal scrolling as needed

Fact label change

New standalone mission editor unit test

VIsual tweaks

Cleanup/fix command json hierarchy

Support for Vehicle and Firmware classes

Fix item initialization problems leading to crashes and incorrect profile display

Fix global alt mode support

Delete bogus Bing no data tiles from cache

Only do no tile checks on Bing providers

Add getMapProviderFromId support

Ability to determine Bing provider

Remove unused test code

Support map zoom to level 23

Reorg of settings order

Gradient units are degrees

Fix ROI, Orbit, Goto handling

Fix max channel handling

Base channel max solely on channel count

Comp Info support for http downloads

New QGCFileDownload support for bit.ly style redirects and file name

Fix find board loop

Remove support for RC_CHANNEL_RAW. Was causing problems with incorrect channel counts.

Retry sync for all boards

Major rework of flash to prevent SiK radio bricking in bootloader mode

Upload pre-check must be vehicle-class based