Improve mobile layout of MR/Issue/Epic comments

Summary

The user info on MR/Issue/Epic comments does not wrap very well on mobile. There is a lot of unused space below the action buttons that could be utilized to help improve the wrapping of the user info.

Steps to reproduce

View any MR/Issue/Epic with comments on a mobile device

What is the current bug behavior?

The username, timestamp, and status wrap unnecessarily on mobile

What is the expected correct behavior?

They should not wrap when there is available space below the action buttons

Relevant logs and/or screenshots

Possible fixes

Float the actions buttons to the right to allow the user info to wrap around it.