FMSLogo Code

Centralize the logic for getting/setting platform-specific font information from/to persistent storage. The logic is a bit clumsy, so I don't want to copy and paste it throughout the code base.

Add logic for setting the font Editor's font.

Fix a bug where setting the font in the registry didn't work in the wxWidgets build. The problem was that I had declared a struct static in SetConfigurationFont(), which means that it should only get initialized the first time it is referenced. So on subsequent calls, the previous value would be used.

Add the rudiments of FMSLogo's minieditor (the special-purpose editor for creating one procedure.

Remove CCommander::OnRichTextChar(), which was only added as an experiment to see if the corresponding event was ever generated.

Add the "Erase Procedures" dialog box. It doesn't do anything yet, but it looks similar to the one in FMSLogo.

Add the "Edit Procedures" dialog box. It doesn't do anything yet, but it looks similar to the one in FMSLogo.

Add a TODO comment

Fix bug #1669735; FOREACH now throws a "not enough inputs" error when given fewer than two inputs.

Add a test that FOREACH is a macro, not a prodcedure (that is, that OUTPUT or STOP will run in the caller's context).