mailbox: show quota instead of disk size

fix quota events too

src/views/emails.js

@@ -436,7 +436,7 @@ angular.module('Application').controller('EmailsController', ['$scope', '$locati
                         if (error) return console.error('Failed to fetch usage for domain', domain.domain, error);
 
                         domain.usage = 0;
-                        Object.keys(usage).forEach(function (m) { domain.usage += usage[m].size; });
+                        Object.keys(usage).forEach(function (m) { domain.usage += (usage[m].quotaValue * 1024); });
                     });
                 });
             });