Additional Speech Stoppers

[TTWNO]

As Cameron points out in their issue, Odilia only stops speech when the control key is pressed. Obviously, there are a few other cases where speech may want to be interrupted.

For example:

1. Switching applications.
2. Typing a letter.

For 1) it should be fairly easy to do if the default SpeechDispatcher priority can be set to allow interruption. For 2) I'm not sure how to do this without pretty extensive overhauls to our fork of swhkd.