Fixed: choice images were generated with the wrong context from invalidate()

Choice thumbnails are now checked to not be 'local' before reading from cache, fixes issue with wrong rarity symbol in the drop down list;
Disabled unimplemented menu items;
Multiple choice items for RENDER_LIST are now zoomed, and positioning is on rotated cards is fixed.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@650 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/field.hpp

@@ -135,7 +135,7 @@ class Style : public IntrusivePtrVirtualBase {
 	/** In particular, if dep == DEP_DUMMY and name is a content property, set dep.index=true */
 	virtual void markDependencyMember(const String& name, const Dependency&) const;
 	/// Invalidate scripted images for this style
-	virtual void invalidate(Context&) {}
+	virtual void invalidate() {}
 	
 	/// Add a StyleListener
 	void addListener(StyleListener*);