Ability to assign a shortcut key to the .ts and .html files

[MRL-00]

It would be great if we could assign a shortcut key to open the files instead of having to click the button.

e.g. if you were in the .html file, pressing a shortcut key (e.g. alt + s) would open the corresponding .ts file and vice versa.

[cypressious]

You should be able to define shortcuts for the individual actions. Contributions welcome for a generic action to switch between TS and HTML.