Added an accelerator for "Fixed Width" and changed the visible shortcut to "t" accordingly
Added an accelerator for "Fixed Width" and changed the visible shortcut to "t" accordingly

Fixed bug #357426 which wanted to have a visible shortcut for "Fixed Width" and suggested
ctrl + t. Fixed #418964 as well which complains about the inconsistently underlined "F"
although ctrl + f is not the right shortcut. Now ctrl + t toggles fixed width formatting
and is underlined accordingly.

rotty3000/tomboy,tomboy-notes/tomboy,rotty3000/tomboy,grepory/tomboy,MatteoNardi/Tomboy,MatteoNardi/Tomboy,rmayr/privatenotes-tomboyaddin,oluc/tomboy,oluc/tomboy,oluc/tomboy,MatteoNardi/Tomboy,rotty3000/tomboy,oluc/tomboy,tomboy-notes/tomboy,MatteoNardi/Tomboy,tomboy-notes/tomboy,rmayr/privatenotes-tomboyaddin,rmayr/privatenotes-tomboyaddin,grepory/tomboy,rotty3000/tomboy,grepory/tomboy,rotty3000/tomboy,tomboy-notes/tomboy,grepory/tomboy,oluc/tomboy,rmayr/privatenotes-tomboyaddin,rmayr/privatenotes-tomboyaddin,MatteoNardi/Tomboy,oluc/tomboy,tomboy-notes/tomboy,MatteoNardi/Tomboy,grepory/tomboy