[Glitch] Make handle button text selectable

Port 8e15e49e87 to glitch-soc

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

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

@@ -110,6 +110,9 @@
   word-break: break-all;
   text-align: left;
 
+  /* Allow the handle text to be selected */
+  user-select: text;
+
   > svg {
     width: 16px;
     height: 16px;