UI: Fix button callback in OBSPropertiesView created with an id

Before calling the button callback, two values are null-checked but when
the property is created with an id (const char*). Those values are null
which prevent the callback from being called.

UI/properties-view.cpp

@@ -1971,13 +1971,12 @@ void WidgetInfo::ButtonClicked()
 		}
 		return;
 	}
-	if (view->rawObj || view->weakObj) {
-		OBSObject strongObj = view->GetObject();
-		void *obj = strongObj ? strongObj.Get() : view->rawObj;
-		if (obs_property_button_clicked(property, obj)) {
-			QMetaObject::invokeMethod(view, "RefreshProperties",
-						  Qt::QueuedConnection);
-		}
+
+	OBSObject strongObj = view->GetObject();
+	void *obj = strongObj ? strongObj.Get() : view->rawObj;
+	if (obs_property_button_clicked(property, obj)) {
+		QMetaObject::invokeMethod(view, "RefreshProperties",
+					  Qt::QueuedConnection);
 	}
 }