Add ability to block account from post dropdown menu

[rshigg]

Details

While #3708 already exists, it hasn't been updated sine April and I personally don't think including the mute option is necessary. If it is decided that a mute button is needed/wanted, I can update this PR or I could open a separate PR.

• I matched the blocking flow from the profile header but made it one-directional.
• I grouped the block option with the report option because they are both moderation actions.

Note: I don't consider this PR complete since I assume we will want some sort of visual feedback that a user was blocked while in a feed. My initial thinking was to hide the post after blocking but it felt a little janky. I would appreciate some feedback.

Demo

(Sorry Abby and Jerry, it's not personal 😅 )

From a feed	From a profile page