[Glitch] Fix long account username leaving container

Port 234af14966 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/styles/components.scss

@@ -2014,6 +2014,8 @@ body > [data-popper-placement] {
         }
 
         &__handle {
+          overflow: hidden;
+          text-overflow: ellipsis;
           user-select: all;
         }
       }
@@ -8333,6 +8335,8 @@ noscript {
           text-overflow: ellipsis;
 
           span {
+            overflow: hidden;
+            text-overflow: ellipsis;
             user-select: all;
           }