It's no longer used, and the new set up for MixerTrackCluster makes them
unable to change the type of the slider (so it should also no longer need
to be used).
... However there is some code in class ASlider meant to draw focus border.
But I verified that this had no effect on Mac, even in 2.1.1.
So, still no border.
... for functions in final classes.
override is like const -- it's not necessary, but it helps the compiler to
catch mistakes.
There may be some overriding functions not explicitly declared virtual and I did
not identify such cases, in which I might also add override.
... Should have no effect on generated code, except perhaps some slight faster
virtual function calls. Mostly useful as documentation of design intent.
Tried to mark every one of our classes that inherits from another, or is a
base for others, or has abstract virtual functions, and a few others besides.
This fixes the problem on GTK where the text was unreadable when
using a "dark" theme.
And fixes the double display of the real tooltip and the tip panel
being displayed at the same time on GTK and OSX. It seems that
the "disabling/reenabling" of tooltips doesn't take affect right
away anymore...maybe it never did.
It was producing "ghost" windows on OSX in wx3. These were
supposed to be hidden, but they weren't any longer and after
reviewing TipPanel, I realized that there was a separate
code path for OSX entirely...must've gone back to some of the
earliest versions.
Now all platforms use the same bit of code.
