import translation work from https://crowdin.com/project/ublock

src/_locales/ko/messages.json

@@ -352,7 +352,7 @@
     "description": "English: Apply changes"
   },
   "3pGroupDefault": {
-    "message": "Built-in",
+    "message": "uBlock₀ 제공",
     "description": "Header for the uBlock filters section in 'Filter lists pane'"
   },
   "3pGroupAds": {
@@ -384,7 +384,7 @@
     "description": "English: Custom"
   },
   "3pImport": {
-    "message": "Import...",
+    "message": "직접 추가",
     "description": "The label for the checkbox used to import external filter lists"
   },
   "3pExternalListsHint": {
@@ -600,7 +600,7 @@
     "description": "A link for where to get support"
   },
   "aboutIssues": {
-    "message": "Issue tracker",
+    "message": "이슈 트래커",
     "description": "Text for a link to official issue tracker"
   },
   "aboutCode": {