polyfill MAX_SAFE_INTEGER everywhere

www/common/boot2.js

@@ -21,6 +21,11 @@ define([
         };
     }
 
+    // RPC breaks if you don't support Number.MAX_SAFE_INTEGER
+    if (Number && !Number.MAX_SAFE_INTEGER) {
+        Number.MAX_SAFE_INTEGER = 9007199254740991;
+    }
+
     var failStore = function () {
         console.error(new Error('wut'));
         require(['jquery'], function ($) {