Don't check for stronger hash if we have an edit hash

www/common/common-hash.js

@@ -300,6 +300,8 @@ Version 1
         var rHref = href || getRelativeHref(window.location.href);
         var parsed = parsePadUrl(rHref);
         if (!parsed.hash) { return false; }
+        // We can't have a stronger hash if we're already in edit mode
+        if (parsed.hashData && parsed.hashData.mode === 'edit') { return; }
         var stronger;
         Object.keys(recents).some(function (id) {
             var pad = recents[id];

www/common/cryptpad-common.js

@@ -557,6 +557,11 @@ define([
             return void cb(null, hashes);
         }
 
+        if (hashes.editHash) {
+            // no need to find stronger if we already have edit hash
+            return void cb(null, hashes);
+        }
+
         postMessage("GET_STRONGER_HASH", {
             href: window.location.href
         }, function (hash) {