adding back fa- to icons so can more easily find them in code and removing helper function that added fa- automatically

ayanova/src/views/home-password.vue

@@ -269,7 +269,7 @@ function clickHandler(menuItem) {
 function generateMenu(vm) {
   var menuOptions = {
     isMain: true,
-    icon: "key",
+    icon: "fa-key",
     title: window.$gz.translation.get("SetLoginPassword"),
     helpUrl: "form-home-password",
     menuItems: []
@@ -278,7 +278,7 @@ function generateMenu(vm) {
   if (vm.rights.change) {
     menuOptions.menuItems.push({
       title: window.$gz.translation.get("Save"),
-      icon: "save",
+      icon: "fa-save",
       surface: true,
       key: FORM_KEY + ":save",
       vm: vm