Link ids were being used interchangeably with the mavlink channel for
the link. Link ids handed out as a numerically increasing integer. Once
the counter went past MAVLINK_COMM_NUM_BUFFERS all hell would break
loose and cause memory corruption.

Also removed partially implemented an incorrect getCommunicationStatus
api

More consistent with Qml usage pattern

Also many LinkManager API changes to further isolate all link
management inside LinkManager.

Made light palette reverse of dark palette

Line chart widget: Auto-force ground time if offset is more than 3 seconds (30% of default view width)

Also changed to pull specific small parameters set after cal instead of
full refresh. This way, the red/green indicators update much more
quickly.

Also converted to new logging category

So this special casing is no longer needed