UI tweaks

Limit chart to 6 series (arbitrary)
UI tweaks

WIP - MAVLink chart as a control. Add any number of charts with any number of series. All individually controlled.

Add custom chart header

Stable sync

Stable sync

Update Ardusub Metadata and Tuning page for Sub 4.0

Don't show GCS heading unless it comes from plugin

Heading value should be real so NaN comes through

Only trust gcs heading from plugin

Fix MAV_CMD_IMAGE_START_CAPTURE usage

Fix MAV_CMD_IMAGE_START_CAPTURE unit test usage for take photo

Vehicle clear failure

Fix MAV_CMD_IMAGE_START_CAPTURE usage

Windows: 64 bit installer changes

64 bit installer changes

APM Heli Setup change for parameter name

ROI for manual flight

Update localization files

# Conflicts:
#	ChangeLog.md

Fix reference to null

Move label for better fit