Fix Mode Change for copter other than Quad

Issue #719 When changing a mode either using the remote or the tablet,
Droidplanner did not correctly show the current set mode for copter
types other than MAV_TYPE_QUADROTOR.
This was due to the enumeration of the modes only having modes for
QUADROTOR.
Fix Mode not updating

Adding isCopter check to second getMode function
Merge pull request #727 from jmachuca77/Mode-Change-Fixe

Issue #719 Fix Mode Change for copter other than Quad