Actions Tag drop-down in lower case?

I think it would be more readable if the contents of the drop-down on the Data screen's Action tab were in lower case.

For example:

LOITER_UNLIM -> Loiter (or maybe just remove this option because we already have a Loiter button)
PREFLIGHT_CALIB -> Preflight Calibration (or whatever will fit)
PREFLIGHT_REBO -> Preflight Reboot
etc.

Start at Mission Planner's Data screen and inspect the Action tab's drop-down entries. Identify where labels such as LOITER_UNLIM and PREFLIGHT_CALIB are defined, then update the displayed wording consistently and verify that the options remain usable; resolve whether the existing Loiter option should be removed.

Written by the indexing model from the issue text.