i18n: appliesRemoveError

_locales/en/messages.json

@@ -56,6 +56,10 @@
     "message": "Remove",
     "description": "Label for the button to remove an 'applies' entry"
   },
+  "appliesRemoveError": {
+    "message": "Can not remove last 'applies to' entry",
+    "description": "Error displayed when the last 'applies' is going to be removed"
+  },
   "appliesSpecify": {
     "message": "Specify",
     "description": "Label for the button to make a style apply only to specific sites"

edit/applies-to-line-widget.js

@@ -264,8 +264,7 @@ function createAppliesToLineWidget(cm) {
           let to;
           if (applies.length < 2) {
             messageBox({
-              title: 'Error',
-              contents: 'Can\'t remove last applies-to',
+              contents: chrome.i18n.getMessage('appliesRemoveError'),
               buttons: [t('confirmClose')]
             });
             return;