ENGCOM-2036: [Backport] #16079 translation possibility for moreButtonText #16229

 - Merge Pull Request #16229 from Karlasa/magento2:2.1-develop-PR-port-16190
 - Merged commits:
   1. d09dbe4
   2. f523032

Author: magento-engcom-team

app/code/Magento/Swatches/i18n/en_US.csv

@@ -35,3 +35,4 @@ Image,Image
 "Image Position","Image Position"
 "The value of Admin must be unique.","The value of Admin must be unique."
 "Description","Description"
+"More","More"

app/code/Magento/Swatches/view/frontend/web/js/swatch-renderer.js

@@ -235,7 +235,7 @@ define([
             controlLabelId: '',
 
             // text for more button
-            moreButtonText: 'More',
+            moreButtonText: $t('More'),
 
             // Callback url for media
             mediaCallback: '',