(cherry picked from commit 4b73b4a49f542e2e051da6ee50e54f7fe06a13b1)

* Remove unneeded mutex

* Cleanup LinkInterface, fix connect/disconnect bug

New VehicleLinkManager implementation

Refactor/fixes for ProximityRadar and friends

Full BATTERY_STATUS support

Unified photo/video control which works with mavlink cameras and just video stream

Support null for FactMetaData default

Shorten meta data keys for smaller file sizes

Fix deprecated usage

Support parameter meta data coming from COMPONENT_INFORMATION as well as old system

Add typeToString method

New initial connect state machine which supports COMPONENT_INFORMATION

Initial support for global plan-wide altitude mode setting

LinkInterface and Vehicle uses mutexes to synchronize writing bytes to the link instead of queued signals

Fix min/max tests

Remove altitude mode warning which was causing recursion into dialog display and view switch problems

Remove missing support for QGCView fact missing overlays

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Add custom validator support

Add support for Json file string translations

Small visual tweaks and fixups for patterns

Cache new metadata if versions are equal