Plotting data now defaults to drawing a line with no symbols.

Qt5 fixes

Mavlink FTP implementation List command

These changes prevent random encapsulated data packets as being thought
to be images.

Also changes for Ack timeouts and unit testing

Also deleted invalid line drawing options.

espeak: provide string length including 0 character

Removed mavlinkgen application.

Refactor MAVLink packet loss calculations

Detach the map widget - rebase