Add Config model

* Add ability to configurably cache API responses per model
* Fix general error display on credentials
* Add current version from API to the documentation link

awx/ui/client/lib/components/modal/_index.less

@@ -1,6 +1,6 @@
 .at-Modal-body {
     font-size: @at-font-size;
-    padding: 0;
+    padding: @at-padding-panel 0;
 }
 
 .at-Modal-dismiss {

awx/ui/client/lib/components/modal/modal.directive.js

@@ -10,13 +10,15 @@ function atModalLink (scope, el, attrs, controllers) {
     });
 }
 
-function AtModalController (eventService) {
+function AtModalController (eventService, strings) {
     let vm = this;
 
     let overlay;
     let modal;
     let listeners;
 
+    vm.strings = strings;
+
     vm.init = (scope, el) => {
         overlay = el[0];
         modal = el.find('.at-Modal-window')[0];
@@ -67,7 +69,10 @@ function AtModalController (eventService) {
     };
 }
 
-AtModalController.$inject = ['EventService'];
+AtModalController.$inject = [
+    'EventService',
+    'ComponentsStrings'
+]
 
 function atModal (pathService) {
     return {