per-browser source id so we support having notecase opened in multiple tabs/windows

views/index.ejs

@@ -291,6 +291,10 @@
 
     <script type="text/javascript">
       const baseApiUrl = 'api/';
+      const glob = {
+          activeDialog: null,
+          sourceId: '<%= sourceId %>'
+      };
     </script>
 
     <!-- Required for correct loading of scripts in Electron -->