Minesweeper puzzle editor, many bug fixes including issue 877, visual changes, addition to test suites, tree controller improvements

[willyoung366]

Description

Created the puzzle editor functionality for minesweeper. Fixed the puzzle editor in short truth tables (bug 877). Renamed minesweeper files. Changed minesweeper graphics.

Closes #(877)

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] Enhancement (improvement to an already existing feature)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

I created several minesweeper and short truth tables files and ran into no issues

Checklist:

• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation (if applicable)
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[willyoung366]

I remember now why the 123456 minesweeper file exists and you can delete it, it was for taking screenshots of tiles