... which makes Project.cpp a bit less dependent on some details of other
classes
This puts Tags.cpp back into the big strongly connected component of the
dependency graph. That will be remedied later when Project.cpp becomes a
low-level file
... Send an event via the app that projects listen to for theme update; don't
push it to projects directly.
This frees three files from dependency cycles.
... There was no reason to store the help location preferences as per-project
state. Also move the dialog for quick fixes near its only use in
HelpMenus.cpp.
This takes 22 files out of the big strongly connected component, notably
the much used lower level utilities, ErrorDialog and AudacityException.
HelpSystem itself is still in a small cycle with LinkingHtmlWindow.
... and break its compile dependency on CommandManager.h by letting it install
callbacks.
This also removes Objective-C mixed code from CommmandManager.
This also eliminates four inclusions of Project.h!
Capture handler state is also global, not per project, though the
CommandManager's callbacks still do depend on the active project.
... Unnecessary because transitively included.
But each .cpp file still includes its own .h file near the top to ensure
that it compiles indenendently, even if it is reincluded transitively later.
... the error checking might not be complete, but it is sufficient for the
observed cases, where switching between 32 and 64 bit Mac builds causes
auto-recovery in one build to destroy the data saved by the other build.
Now instead, you will see an error message, recommending that you run the
same version of Audacity that produced the file.
Note that decoding of autosave files can also (less commonly) happen with
a command-line argument, and a message is written to standard out. Give the
same message in that case.
Localization of this changed message unfortunately can't happen this late in
2.3.2 development.
... Reimplement the ESC key handling in TrackPanel and time ruler on all
operating systems so that it does not rely on the focused window, but instead
uses the application-wide event filter.
This includes reversion of 9491605cfc
... except Audacity.h; and in no others.
Do so even if Experimental.h gets multiply included, as in both the .h and
.cpp files.
This makes it easier to do a text scan to be sure there are no unintended quiet
changes of meaning because of omission of Experimental.h when the flag is
an enabled one.
Also move inclusions of Experimental.h earlier.
Also don't require Experimental.h to be preceded by Audacity.h to define
EXPERIMENTAL_MIDI_OUT correctly.
