Fix jab extended keybindings

[rpaquay]

This fix addresses issue #6081.

[michaelDCurran]

Could that massive control code if tree be converted into a dictionary perhaps in JABHandler? It may offer a slight performance boost, plus it will be more readable in my opinion. Obviously the f1 through f24 keys would not be part of it.

[LeonarddeR]

@rpaquay: Have you addressed the review comment for this?

[feerrenrut]

This is a change that we would like to accept, however some small modifications need to be made to the code before we can do so.

[Adriani90]

@rpaquay are you still available to finalize this work?

[LeonarddeR]

After several attempts to contact the author of this pull request without luck, I'm closing this for now. Note that #6081 is still open, so anyone who suffers from this bug who is able to work on it can easily find this pull request and Revive it.

[Adriani90]

@rpaquay, I saw that you commented on some issue recently, but in case you are not able to continue work on this, maybe @kaleev or something else could take this over?
If the work on this can be continued, then please confirm and we can reopen.

[rpaquay]

@Adriani90 I am not actively working on this project anymore, and I don't have any means to manually verify these changes anymore, but the requested change in the comment is trivial.