colocate editable label styles and code (#9120)

ui/app/components/app/index.scss

@@ -10,6 +10,7 @@
 @import 'confirm-page-container/index';
 @import '../ui/currency-input/index';
 @import '../ui/currency-display/index';
+@import '../ui/editable-label/index';
 @import '../ui/error-message/index';
 @import '../ui/export-text-container/index';
 @import '../ui/identicon/index';

ui/app/components/ui/editable-label/index.js

@@ -0,0 +1 @@
+export { default } from './editable-label'

ui/app/css/itcss/components/index.scss

@@ -21,7 +21,6 @@
 @import './request-signature';
 @import './request-encryption-public-key';
 @import './request-decrypt-message';
-@import './editable-label';
 @import './pages/index';
 @import './new-account';
 @import './tooltip';

ui/app/css/itcss/components/sections.scss

@@ -100,10 +100,6 @@ textarea.twelve-word-phrase {
   padding-left: 5px;
 }
 
-.editable-label {
-  display: flex;
-}
-
 /* accounts */
 
 .accounts-section {