Move mocha timeout setup to test.js

Co-authored-by: Fedor Indutny <79877362+indutny-signal@users.noreply.github.com>

test/index.html

@@ -68,8 +68,6 @@
     <script type="text/javascript">
       window.Signal.conversationControllerStart();
 
-      mocha.setup({ timeout: 10000 });
-
       window.testUtilities.prepareTests();
       delete window.testUtilities.prepareTests;
 

test/test.js

@@ -7,6 +7,8 @@
  * global helpers for tests
  */
 
+mocha.setup({ timeout: 10000 });
+
 function deleteIndexedDB() {
   return new Promise((resolve, reject) => {
     const idbReq = indexedDB.deleteDatabase('test');