Would it be possible to enable tweaking of COMBO values like checkpoint name?

[KamilBeda]

Hi!
I've just downloaded your plugin and I love it!
What I'm missing though is an ability to "tweak" checkpoint name in a variables bar. Would that be possible to add such feature?

Here's how it looks like now.
Toolbar:

Variable settings:

Please consider uploading unminificated code to the repo, I'm a web dev myself, I could contribute sometimes.
Thanks for all your work, much appreciated.

[KamilBeda]

PS. Tweak ability for booleans would also be awesome