Conditional -> GUIObject and make all gui objects children of GUIObject

Signed-off-by: Vojtech Bocek <vbocek@gmail.com>

Change-Id: Ic0a7d6354dabe5919b83942f2f1aa0715625e522
diff --git a/gui/action.cpp b/gui/action.cpp
index 9c785d1..951feb1 100644
--- a/gui/action.cpp
+++ b/gui/action.cpp
@@ -67,7 +67,7 @@
 void curtainClose(void);
 
 GUIAction::GUIAction(xml_node<>* node)
-	: Conditional(node)
+	: GUIObject(node)
 {
 	xml_node<>* child;
 	xml_node<>* actions;