Remove the hard coded extension ID

Author: PassionZhao

extension/background.js

@@ -50,7 +50,7 @@ function dodownload (msg,tiddlywikilocations){
 	console.log("id:" + chrome.runtime.id)
 
     chrome.downloads.onDeterminingFilename.addListener(function SuggestFilename(item, suggest) {
-        if (item.byExtensionId && item.byExtensionId === 'bjjekbdjkkbialgkidepcfhccflcieia') {
+        if (item.byExtensionId && item.byExtensionId === chrome.runtime.id) {
 		    suggest({filename: tiddlywikilocations+$["/"]+ msg.path, conflictAction: 'overwrite'});	
 			chrome.downloads.onDeterminingFilename.removeListener(SuggestFilename);
         }