#2 Add accelerator keys to TextFX main menu

[Pierre]

Thank you for an excellent plugin.

I think it would be worthwhile to add accelerator keys to the TextFX main menu (i.e. replace TextFX by Text&FX in the code, so to be able to access the menu by pressing alt+f).
The same modification is to be performed in the sub-menus of TextFX, so that any item can be accessed via a keystroke alt+f+..