======Event_TabSwitch======
This event is sent to the plugin after a click on a (different) tab.

The event can be activated/deactivated in the plugin manifest.

===Values===
  * **//(integer) windowhandle//** - Windowhandle of the current GRT main window
  * **//(integer) tabhandle//** - Tabhandle of the currently activated tab (load file)

===JSON source (example)===
<code>
{
  "Event_TabSwitch":{
    "windowhandle":531876,
    "tabhandle":120858727,
  }
}
</code>