Fix action buttons #145
Description
Hi, I was trying the new mute action and it caught my attention that, while the Resolve / Unresolve action is a button, the new Mute / Unmute action is a link. Both should be buttons, as they trigger actions, aren't used for navigation.
Making both actions as button provides a unified experience when using the keyboard, as buttons can be triggered using the space and return keys, whereas links can't be triggered with the space key.
I'm working on a PR that also fixes the Unmute action as it's currently broken in two lines.
Here's my work in progress, as soon as I fix the responsive design for it I'll send a PR if that's OK.