Aspect ratio for some avatars on project members page is wrong on small screens

Steps to reproduce

  • open project members page on small screen

What is the current bug behavior?

aspect ratio is wrong:

Screen_Shot_2018-07-12_at_23.25.31

What is the expected correct behavior?

aspect ratio is correct:

Screen_Shot_2018-07-12_at_23.24.51

Possible fixes

add a min-width to the avatars