Fix sample handling in toolbar in tb_format FS#2691

The previous fix in e38f3066 fixed this
bug only in tb_formatln.

lib/scripts/toolbar.js

@@ -72,7 +72,7 @@ function initToolbar(tbid,edid,tb, allowblock){
  * @author Andreas Gohr <andi@splitbrain.org>
  */
 function tb_format(btn, props, edid) {
-    var sample = props.title || props.sample;
+    var sample = props.sample || props.title;
     insertTags(edid,
                fixtxt(props.open),
                fixtxt(props.close),