remove px

bigbluebutton-html5/imports/ui/components/user-list/user-list-content/user-participants/user-options/styles.scss

@@ -24,7 +24,7 @@
 .optionsButton{
   border-radius: 50%;
   display: block;
-  padding: 0px;
+  padding: 0;
 
   i {
     width: auto;