Mission Edit Widget: Add more missing APM mission command definitions

Added:
CONDITION_DISTANCE
DO_CHANGE_SPEED
DO_SET_RELAY
DO_REPEAT_RELAY 
DO_SET_HOME
DO_SET_CAM_TRIGG_DIST
Mission Edit Widget: entry updates are much more responsive
Mission Edit Widget: Fix Take Off command to not show location in Mission Frame mode
Mission Edit Widget: Add DO_MOUNT_CONTROL command support
Mission Edit Widget: Fix Typo for Do Set Home
Mission Edit Widget: Changes to DO SET HOME layout
Mission Edit Widget: Layout fix to Condition Yaw
Mission Edit Widget: Fixes to layout of DO commands

DoChangeSpeed
DoSetRelay
DoRepeatRelay
DoSetCamTriggDistance
Mission Edit Widget: Fix to layout to show commands better in comboBox
Mission Edit Widget: Remove Alt color strategy from mission edit widget