FMSLogo Code

Add an explanatory comment.

Add the window class for the editor when looking for it.
This hardens the test against other windows whose title is Editor.

Clarify how EQUALP interacts with Unicode
In particular, equivalent characters are equal when case is ignored, but are not equal when case is honored.

Extend EQUALP.UNICODE to include non-Latin characters
The previous tests passed on FMSLogo 7.7.0. This tests the BMP Unicode support for EQUALP that was added in 8.0.0.

Add a helper procedure for editing files in FMSLogo.
I have heretofore been using xemacs and the FMSLogo editor may have suffered as a result.
My hope is that by using FMSLogo to edit logo files, I'll be forced to confront its deficiencies and will work to improve it.

Minor changes to EQUALPTEST.INTERNATIONAL:
- Rename to EQUALPTEST.UNICODE
- Add explanatory comments
- Remove redundant tests

Formally thank Sascha Zindel for:
- Getting FMSLogo to run on a Raspberry Pi

Formally thank Sascha Zindel for:
- Getting FMSLogo to run on a Raspberry Pi

Formally thank Manfred Zindel for:
- Opening a bug about \n being replaced with backslash-newline in editor.
- Opening a bug about MESSAGEBOX using commander as parent when its minimized.
- Stimulating discussion about ways to use FMSLogo in schools.
- Advocating for FMSLogo in Germany schools.

Formally thank Manfred Zindel for:
- Opening a bug about \n being replaced with backslash-newline in editor.
- Opening a bug about MESSAGEBOX using commander as parent when its minimized.
- Stimulating discussion about ways to use FMSLogo in schools.
- Advocating for FMSLogo in Germany schools.