Expose the activated signal into the plasmoid

This was a regression from Plasma 1.

Reviewed by David Edmundson

src/scriptengines/qml/plasmoid/appletinterface.cpp

@@ -71,6 +71,8 @@ AppletInterface::AppletInterface(DeclarativeAppletScript *script, QQuickItem *pa
 
     connect(applet(), &Plasma::Applet::statusChanged,
             this, &AppletInterface::statusChanged);
+    connect(applet(), &Plasma::Applet::activated,
+            this, &AppletInterface::activated);
 
     connect(appletScript(), &DeclarativeAppletScript::formFactorChanged,
             this, &AppletInterface::formFactorChanged);

src/scriptengines/qml/plasmoid/appletinterface.h

@@ -287,6 +287,11 @@ Q_SIGNALS:
 
     void configNeedsSaving();
 
+    /**
+     * Emitted when the applet's activation action is triggered
+     */
+    void activated();
+
 
 //PROPERTY change notifiers--------------
     void iconChanged();