Use AIFilePicker everywhere.

Also upgrade the file picker filters with the new extensions found
in the orginal file picker code of Singularity.

Also improve AIFilePicker a bit: added hasFilename() and now
deleting the statemachine automatically by default: it's no longer
needed to call deleteMe from the callback.

indra/newview/llpreviewanim.h

@@ -36,6 +36,8 @@
 #include "llpreview.h"
 #include "llcharacter.h"
 
+class AIFilePicker;
+
 class LLPreviewAnim : public LLPreview
 {
 public:
@@ -59,6 +61,7 @@ public:
 									   const LLUUID& asset_uuid,
 									   LLAssetType::EType type,
 									   void* user_data, S32 status, LLExtStat ext_status);
+	static void gotAssetForSave_continued(char* buffer, S32 size, AIFilePicker* filepicker);
 	static void copyAnimID(void* userdata);
 	// </edit>
 	static void endAnimCallback( void *userdata );