Made RequireJS optimization work with the new startup sequence

Normally `r.js`, the RequireJS optimizer, only pulls in dependencies
listed in top level `require` and `define` clauses.
Because we now most of the app code asynchronously,
namely once the translations are loaded,
this basically rendered optimization useless for us.
This fixes that by also incorporating static nested/asynchronous dependencies.

frontend/Gruntfile.js

@@ -369,6 +369,7 @@ module.exports = function (grunt) {
                     preserveLicenseComments    : false,
                     optimize                   : 'uglify',
                     useStrict                  : true,
+                    findNestedDependencies     : true,
                     out                        : '<%= currentProfile.target %>/optimized.js'
                 }
             }