Stay on same page after performing action

[tanmayrajani]

Closes #70

• [x] Mark as read/unread/muted/unmuted
• [x] Code cleanup (~is it okay to keep a copy of delegate-it in utils.js~)
• [ ] Mark all as read
• [ ] Save for later (fails, uses GraphQL API)

[tanmayrajani]

Thanks so much for your inputs @fregante. Code looks much cleaner now.

Even if we let "save for later" go for now, I think we should do something about "mark all as read" at least? WDYT?

Or, should we merge this first and then look into other pending things?

[sfdye]

It will be great if we can get the "stay on same page" behavior back, then the new features :)