Removes a possible hang on Windows

This was causing a MOC compiler warnings. Also removed an unused
control.

Also fixed bug where channel detection number had off by 1. Also
changed UI to show channel reversal.

Specifically:
- Channel reversing
- Incorrect usage of function and channel index

Also fixed typo in offline waypoint editing message.

This reverts commit b4089ad9.

Added the possibilty to see only one UAS at the time with the drop down menu after clearing the view