Add/enable codemirror's javascript-lint using jshint, and fix a few things.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4248 ed5197a5-7fde-0310-b194-c3ffbd925b24

apps/db/app.js

@@ -20,7 +20,7 @@ async function database_list() {
 	}
 	populate_dbs('dbs', ${JSON.stringify(dbs)});
 </script>
-</html>`
+</html>`;
 	app.setDocument(doc);
 }
 
@@ -47,7 +47,7 @@ async function key_list(db) {
 	}
 	populate_dbs('keys', ${JSON.stringify(object)});
 </script>
-</html>`
+</html>`;
 	app.setDocument(doc);
 }