Add update scoreboard and challenge board functions to window global (#1957)

* Closes #1841
* Adds update scoreboard and challenge board functions to window global
* This is a stop gap measure before we start using CTFd.js more heavily

CTFd/themes/core/assets/js/pages/challenges.js

@@ -428,3 +428,5 @@ const loadHint = id => {
     displayUnlock(id);
   });
 };
+
+window.updateChallengeBoard = update;

CTFd/themes/core/assets/js/pages/scoreboard.js

@@ -175,3 +175,5 @@ $(() => {
   setInterval(update, 300000); // Update scores every 5 minutes
   createGraph();
 });
+
+window.updateScoreboard = update;