Anki add-on: Fix Edit Menu's Shortcut-Tooltips

This add-on will let the dropdown menu in the editor show tooltips with the shortcut to trigger them (i.e. "MathJax inline (Ctrl+M, M)", etc.). The items affected are: - MathJax inline - MathJax block - MathJax chemistry - LaTeX - LaTeX equation - LaTeX math env. - Edit HTML All this add-on does is to replace the editor's method (the one, which generates the dropdown menu) with my own method. My own method is pretty much a copy of the original with a few extra lines to add the tooltips. This is my first add-on, so please try it out and give me feedback, thx :-)