... Problem with static initialization order of ReservedCommandFlags, caused
wrong enablement of menu items (at least on Mac), such as Plot Spectrum or
Contrast enabled when there was no selection
... which was redundant with what happens in the yield to idle events in
ProjectAudioManager::Stop.
This removes direct dependency of ProjectAudioManager on ControlToolBar.
And remove another #include we don't need
ControlToolBar, after we make a system to register functions that calculate
necessary minimum widths for status bar fields.
Also let Scrubbing.cpp register its own strings.
Also be sure to size the status field sufficiently for "Playing at Speed".
... So that ControlToolBar::StopPlaying now does nothing directly to the
buttons, and can be moved to another place with no dependency on ControlToolBar
... so most calls to ControlToolBar::SetPlay are removed. One remains in
TransportMenus, which will not be problematic for untangling dependencies,
and one remains where the toolbar remakes its own buttons.
But the routines that start and stop the streams, importantly, don't use it.
... Move that into ProjectAudioManager instead, and update the button, only to
reflect it, in idle time.
However, AudioIO also has its mPaused member variable, and it is not obvious
that it was always kept the same as the button state. No attempt was made
here to identify and fix any bugs, but only to preserve behavior.
... not the best thing for the long term, but hidden dependencies on
TransportMenus.cpp are eliminated
Tying CommonCommandFlags again into the big component, which is now 26
