Re-enable listing of forks when logged out (#14992)

* Re-enable listing of forks when logged out

* Further improvements on repo button logic

web_src/less/_base.less

@@ -1585,6 +1585,7 @@ a.ui.label:hover {
   border-left: none;
 }
 
+.ui.labeled.button.disabled > .button,
 .ui.basic.buttons .button,
 .ui.basic.button {
   color: var(--color-text-light);