update translations for 7-2/master

and force-fix errors using pocheck

Change-Id: I76dedce86c4402c3a3cbb4ad01c3cfaba8732f43

source/ko/basic/messages.po

@@ -4,7 +4,7 @@ msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://bugs.libreoffice.org/enter_bug.cgi?product=LibreOffice&bug_status=UNCONFIRMED&component=UI\n"
 "POT-Creation-Date: 2021-01-19 13:12+0100\n"
-"PO-Revision-Date: 2021-07-08 08:50+0000\n"
+"PO-Revision-Date: 2021-08-25 05:04+0000\n"
 "Last-Translator: DaeHyun Sung(성대현, 成大鉉) <sungdh86@gmail.com>\n"
 "Language-Team: Korean <https://translations.documentfoundation.org/projects/libo_ui-master/basicmessages/ko/>\n"
 "Language: ko\n"
@@ -862,7 +862,7 @@ msgstr "$(ARG1)"
 #. wH3TZ
 msgctxt "stock"
 msgid "_Add"
-msgstr ""
+msgstr "추가(_A)"
 
 #. S9dsC
 msgctxt "stock"
@@ -872,7 +872,7 @@ msgstr "적용(_A)"
 #. TMo6G
 msgctxt "stock"
 msgid "_Cancel"
-msgstr ""
+msgstr "취소(_C)"
 
 #. MRCkv
 msgctxt "stock"