Is your feature request related to a problem? Please describe.

There's no feedback the action to favorite an article is being processed and makes me believe the site has frozen.

Use case

Not sure what part of my setup makes the action to take a bit of time, I'm guessing it's the sqlite DB being locked during updating the feeds, since I notice this issue more at the times I have the cron setup.

It's more noticeable on feeds with small articles where I can easily use the keyboard to go "J" -> "F".

Describe the solution you’d like

Change the "start" icon to some kind of spinner which makes the user know the action is being processed.

Describe alternatives you’ve considered

Change to postgres to see if updating the feeds doesn't slow down the UI requests.

Additional context

This is also noticeable when going quickly through the articles with "J" and just watching the "unread" envelope not change for a bit for all the articles passed.