When i delete an item it freezes up a little bit,
when you use the enter key it starts up whatever is in 'active',
that should be something like shift + enter by default,
arrow keys switch between items,
that should be shift + (arrow) by default,
overall its a little bit slow,
you should look over your code and see if you have a peace of code that is no longer needed, or if there's something else that can be done in its place to make it faster or sleeker overall.
there are other bugs but not many major bugs,
more like features not yet added,
or features that are too limiting for 'the user'.
I am vary sorry if this seams like I'm complaining about things,
all i can say in my defense is I'm a tough critic.