Disable expand to containing token on fallback

[AndreasArvidsson]

The fallback code we have tells Talon to expand an empty selection to the containing token. Doing this in the search widget works fine but the little cursor dance we do to select a token completely messes up the file explorer when you're trying to copy or paste a file.

#2800

Checklist

• [/] I have added tests
• [/] I have updated the docs and cheatsheet
• [/] I have not broken the cheatsheet