* Trim trailing whitespace
* EDACS: Display cached call source on Standard
The logic in `edacs-fme.c` didn't work, in retrospect, because it would have depended on getting back-to-back messages for the same call. In practice, that is unlikely even on an idle system as system state gets displayed.
Instead, cache on the display end, for a "better" user experience.
* EDACS: Pad channel freq to "000.000000 MHz"
* EDACS: Process/tune group calls on assignment