Minor code cleanup:

- CONTIBUTING.md:20 gives off a warning in Eclipse: "Cannot resolve element with id 'new-features--api-additions'" WikiText Markup Problem

Spelling Errors in the code:

- propogated
- Hueristic2D

TextFieldBehavior.TextInputTypes seems to be unused

MenuBar:171 unnecessary field:
    private String BIND_MSG =
        "cannot uni-directionally bind to the system menu bar - use bindBidrectional instead";

fix formatting in RegionShim