Spinner issues - Fix!!

Addded 2 new clases for Spinner Listener
Fixed the resource name for Altitufe slider from waypointSpeed back to
altitudeView
Fix for small screen devices

Fix for small screen devices - dialog box is scrollable in small devices
Fix for Set Speed - previously not reading from WP for rate and speed
Fix for Set Alt - previouslt crashed the app
Merge branch 'MissionDialogFix' of https://github.com/azrin1972/droidplanner.git into WaypointFixes