[TxMt] Text zooming key combos

[Rich Barton]

The new text zoom feature is great, except that zooming in is literally 
bound to Command+`+` (that's command and the plus key). On PowerBooks 
and iBooks, `+` requires an extra modifier (shift), whereas `-` 
doesn't. Ideally, both would be consistent with one another.

Could zooming in be bound to Command-= (as well as Command-+)? From my 
quick tests, Safari and Proteus similarly support both, but Mail, 
Terminal and TextEdit don't (go figure).

Any opinions on this?

Rich Barton