I wanted to try the abbreviation feature. It seems really useful, but I have some suggestion for improvement:

1) Allow users to chose the sets they want
For instance, I want only HTML set to be enabled, not all of them.
How to implement it:
- The current checkbox ("Space bar expands abbrevs") should enable/disable all abbrev sets
- There should be another checkbox ("Enable this abbrev set") below the "Abbrev set" dropdown list. This one should enable/disable the current abbrev set
- There should also be another checkbox for "select/deselect all" abbrev sets (for resetting everything)

2) Allow users to choose the key for expanding abbrevs
Users should be allowed to choose if the abbrevs should be expanded by space, or some other key combination (e.g. "c-enter")

3) Create a shortcut for toggling abbreviation functionality
For instance, I would like to switch abbreviations on and off without going to main menu

What do you think?
Is this possible?