vidjil.less token cross cursor

set the cursor to a pointer when hovering the cross icon inside the
token span

See #2976

browser/css/vidjil.less

@@ -2261,6 +2261,10 @@ label.highlight_label {
     border: 1px solid #bbb7b3;
     cursor: text;
     width: 50%;
+
+    #set_div span.set_token i.icon-cancel {
+        cursor: pointer;
+    }
 }
 
 #token_input {