Avatar drops in Admin Bar

[spacedmonkey]

In a number of different screen sizes, if a user is logged in and the admin bar is showing, the avatar drops outside the admin bar.

This screenshot is from a browser window less than 328px wide.

This screenshot is from a larger window, but with plugins that add elements to the admin bar

Could some css property like overflow hidden be added, so that the admin bar doesn't brake so ungracefully.

[SergeyBiryukov]

Previously: #26537

[graphical_force]

This issue seems to be taken care of in 4.0.