minor aesthetic style issues

these issues occur in firefox

- when collapsed sidebar expands, 'My Profile' nav item height changes instantly. this can be addressed by `.nav-sidebar .nav-link p { text-wrap-mode: nowrap; }`
- in 'My Profile' page, if profile image's width become less than 220px or 140px, the profile icon becomes ellipse, not circle. removing height from the style would resolve the issue.
https://github.com/AlmaLinux/astra/blob/da376feb822b6ffe4b36313404593cd478fa46cd/astra_app/core/templates/core/user_profile.html#L58
https://github.com/AlmaLinux/astra/blob/da376feb822b6ffe4b36313404593cd478fa46cd/astra_app/core/templates/core/user_profile.html#L65