Support Object Group-level Enable, Via, and Kill menu options. If
anything is enabled, the option will be checked and selecting it will
clear whatever object is checked. If the option is unchecked, the group
is already cleared and selecting it will set all objects in the group.
So, selecting a check will clear all, selecting a non-check will set all.
Add (but disabled for now) Object Group-level Interval and Path
settings. The menu option displays the current setting of all objects
in the group. Interval displays the average of enabled objects, and
Path will display "*Mixed*" if they differ.
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32