Make sure we have the same hash in all the tabs when disconnecting

www/common/cryptpad-common.js

@@ -80,7 +80,7 @@ define([
 
     var logout = common.logout = function (cb) {
         [
-            fileHashKey,
+//            fileHashKey,
             userHashKey,
         ].forEach(function (k) {
             sessionStorage.removeItem(k);
@@ -88,6 +88,11 @@ define([
             delete localStorage[k];
             delete sessionStorage[k];
         });
+        // Make sure we have an FS_hash in localStorage before reloading all the tabs
+        // so that we don't end up with tabs using different anon hashes
+        if (!localStorage[fileHashKey]) {
+            localStorage[fileHashKey] = common.createRandomHash();
+        }
         if (cb) { cb(); }
     };