The user card uses an image with src of /u/myusername/user_icon
when using user icons uploaded into Allura (I haven't checked out exactly what happens with gravatar icons) and those default to 48x48 for legacy reasons. We should use the w
parameters of the icon macros/urls to get a 64x64 image or maybe even 128x128 for hi-dpi screens.
Merged in https://forge-allura.apache.org/p/allura/git/merge-requests/329/