Removes old defines and work arounds for earlier wx versions and adds a
CMake requirement to use at least 3.2 (or the minimum matching wxPython
version)
In wxWidgets 3.15 (and perhaps older version) the call to GetTextExtent() probably
creates major issues when called too many times, at least oo msys2.
It was probably also time costly.
Calling it and resize the PROGRESS_REPORTER only when needed fixes these serious issues.
Issues happened only when the board has a lot of zones (when teardrops are added)
Seth Hillbrand
jean-pierre charras
Jeff Young