Shortcut command to overbar text

[rikster]

Overbars have been available in the code for text labels but unless you were aware of the "\_...\_" sequence you probable weren't using them.

It would be nice to have a menu or shortcut key command that would automatically toggle an overbar on a selected label. The menu command would act as some primitive documentation that the feature is available. (When trying to learn a new program I often go through every menu just to see what my choices are). It would also be a fairly intuitive use. A lot of designers start with the signal in one polarity and then need to toggle the label when the discover that EN is EN_L in whatever chip they are using.