Add shortcuts (toggle & open on alt+click)

[Stvad]

Hi there.

This PR has the following changes:

• Add shortcut to toggle the extension sidebar (set to Alt-1 by default)
• Add ability to open a page in sidebar if you click on a link while holding Alt
• Updates dependencies (via running npm run audit and accepting non-breaking changes)

Overall changes are fairly brief, so I decided to publish them together. Let me know if you'd like me to separate PR into a separate several ones.