... 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.
The problem was that on Linux (not Windows or Mac) menu
events are generated when checking the menu items in
the toolbar menu.
Becuase of the recent changes I made and how the toolbars
are being shown (toggled) when the toolbar menu is checked,
they were simply being hidden. Actually, the were being
shown and then hidden because of the toggle.
So, with this change I made exposing toolbars a bit more
deterministic. The menus still use a toggle, but the
ToolManager now shows or hides the bars explicitly during
setup, so the menu toggle issue is resolved.
We have separate record and play meters. The original kind of meter is now called a combined meter. I've kept it because it can be useful when undocked if you do want both meters. I've also fixed it so that if made very narrow the meters stack vertically just as they already did horizontally.
