Update menu plan

The Excel spreadsheet and accompanying PDF document for the menu plan was incredibly out of date compared to what is actually in ultralcd.cpp

I've updated the spreadsheet with the current strings from languages.h and the menu as it is defined in ultralcd.cpp. I have also removed the custom dot-matrix font so that we don't have to include it in the repository or make any contributors find and install it.

The sheet can now be easily updated with any language by simply copy-and-pasting the section of the language file for that language into the sheet. (There's a tiny fix to the languages.h file in this request, to remove a spurious tab at the end of one line, which just makes the pasting a pain)

If there's a perceived demand for it, I could create a tab for every language, and include them all as a single multi-page PDF output, and users can print the page they want.

Alternatively, I could create separate plans for "printing" and "not printing", as many options are only available in particular states.