fix: Adds a separate css class for thumbnail menu

css/_font.scss

 .icon-kick:before {
   content: "\e904";
 }
+.icon-menu:before {
+  content: "\e91f";
+}
 .icon-menu-up:before {
   content: "\e91f";
 }
 // FIXME not used anymore - consider removing in the next font update
 .icon-presentation:before {
   content: "\e603";
-}
+}