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/llassetuploadresponders.cpp

@@ -293,7 +293,7 @@ void LLNewAgentInventoryResponder::uploadComplete(const LLSD& content)
 
 			view->getPanel()->setSelection(content["new_inventory_item"].asUUID(), TAKE_FOCUS_NO);
 			if((LLAssetType::AT_TEXTURE == asset_type || LLAssetType::AT_SOUND == asset_type)
-				&& LLFilePicker::instance().getFileCount() <= FILE_COUNT_DISPLAY_THRESHOLD)
+				/* FIXME: && LLFilePicker::instance().getFileCount() <= FILE_COUNT_DISPLAY_THRESHOLD */)
 			{
 				view->getPanel()->openSelected();
 			}
@@ -309,7 +309,8 @@ void LLNewAgentInventoryResponder::uploadComplete(const LLSD& content)
 
 	// remove the "Uploading..." message
 	LLUploadDialog::modalUploadFinished();
-	
+
+#if 0 // FIXME: This needs to be done in some other way.
 	// *FIX: This is a pretty big hack. What this does is check the
 	// file picker if there are any more pending uploads. If so,
 	// upload that file.
@@ -339,6 +340,7 @@ void LLNewAgentInventoryResponder::uploadComplete(const LLSD& content)
 				    everyone_perms, display_name,
 				    callback, expected_upload_cost, userdata);
 	}
+#endif
 }
 
 LLSendTexLayerResponder::LLSendTexLayerResponder(const LLSD& post_data,