Expose root plan keys

Add new Help page under Settings

Create new, specific button for clearing mission from vehicle
Adjust sizing of DropPanel

Allow plugins to define a left placement for its custom flight widget.
When placed on the left, the action tool strip is placed on the right side.

Clarify the title of the "Video Stream" panel (instead of just "Video")

Also rename QmlPageInfo to QmlComponentInfo to cover more use cases

Also plugin'ize intrument panel PageView pages

Hide "Save Path" as it breaks the UI in General Settings.

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

Also added Vehicle.flightTime to default setup

Also added insert pattern support to hamburger

Added top/bottom alignment state to map scale
Allow disabling instrument widget altogether
Added an otherwise redundant row to PlanToolbar so it matches the same button position as the main toolbar
Fixed typo (Math.max()) in ScreenTools
Fixed Javascript Exception in OfflineMap
Increased the import window size in OfflineMap
Added function to MainWindow to disable toolbar for a truly modal dialog
Added code so clicking on an open toolbar indicator will cause it to close

Remove showSensorCalibrationOrient