Reverted resource references for combine_something, you can't use tool_image here, because on MSW that only works for .bmps'

Added dependency stuff to invalidate Choice images;
Fixed 'duplicate' in symbol editor

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@197 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/age.cpp

@@ -12,6 +12,6 @@
 
 // what a waste of a source file...
 
-AtomicInt Age::new_age(0);
+AtomicInt Age::new_age(2);
 
 IMPLEMENT_DYNAMIC_ARG(AtomicIntEquiv, last_update_age, 0);

src/util/age.hpp

@@ -23,6 +23,11 @@ class Age {
 	Age() {
 		update();
 	}
+	/// Create a special age
+	/** 0: dummy value, used for other purposes
+	 *  1: before 'beginning of time', the age conceptually just before program start
+	 *  2..: normal ages
+	 */
 	Age(AtomicIntEquiv age) : age(age) {}
 	
 	/// Update the age to become the newest one

src/util/window_id.hpp

@@ -48,7 +48,6 @@ enum MenuID {
 ,	ID_EDIT_COPY			= wxID_COPY
 ,	ID_EDIT_PASTE			= wxID_PASTE
 ,	ID_EDIT_DELETE			= 101
-,	ID_EDIT_DUPLICATE		= 102
 ,	ID_EDIT_FIND			= wxID_FIND
 ,	ID_EDIT_FIND_NEXT		= 103
 ,	ID_EDIT_REPLACE			= wxID_REPLACE
@@ -117,6 +116,7 @@ enum ChildMenuID {
 ,	ID_PART_OVERLAP			= ID_PART + 4//PART_OVERLAP
 ,	ID_PART_BORDER			= ID_PART + 5//PART_BORDER
 ,	ID_PART_MAX
+,	ID_EDIT_DUPLICATE					// duplicating symbol parts
 
 	// SymbolPointEditor toolbar/menu
 ,	ID_SEGMENT				= 2101