Call parent event handlers when clicking an unselected button

Event handler must return true to ensure other event handlers are
called.

issue6522
review40381002

src/view/tree.js

@@ -1689,7 +1689,8 @@
             var record = event.data[0];
             var button = event.data[1];
             if (record != this.screen.current_record) {
-                return;
+                // Need to raise the event to get the record selected
+                return true;
             }
             var states = record.expr_eval(this.attributes.states || {});
             if (states.invisible || states.readonly) {