Organisation of Blocks in Menus

I notice the Blocks Menus are organised in alphabetic order. Whilst there is a logic to them being in that order, since most students will graduate from the regular BLOCK or PXT BLOCK to Python Block I think it would help the student if the menus items were (as near as possible) in the same order with the same names and each menu item contained (as near as possible) the same Blocks as BLOCK/PXT BLOCK.

No file or test is named in the issue. Start by locating the menu definitions and comparing the Python Block menus with the regular BLOCK or PXT BLOCK menus; done means their names, order, and contents are aligned as closely as possible.

Written by the indexing model from the issue text.