Fix margin and alignment in dashboard repolist (#22120) (#22122)

Backport #22120 to 1.18. Seems this has recently regressed, previously,
there was a significant whitespace between icon and text, but it seems
to be gone, so I added the margin.

web_src/less/_dashboard.less

@@ -188,7 +188,11 @@
     }
 
     .repo-owner-name-list .item-name {
-      max-width: 70%;
+      min-width: 0;
+    }
+
+    .repo-owner-name-list .item-name svg {
+      min-width: 16px;
     }
   }
 }