Add missing locale lines

locale/gitlab.pot

@@ -8885,6 +8885,12 @@ msgstr ""
 msgid "There are no archived projects yet"
 msgstr ""
 
+msgid "There are no closed issues"
+msgstr ""
+
+msgid "There are no closed merge requests"
+msgstr ""
+
 msgid "There are no custom project templates set up for this GitLab instance. They are enabled from GitLab's Admin Area. Contact your GitLab instance administrator to setup custom project templates."
 msgstr ""
 
@@ -8894,6 +8900,12 @@ msgstr ""
 msgid "There are no labels yet"
 msgstr ""
 
+msgid "There are no open issues"
+msgstr ""
+
+msgid "There are no open merge requests"
+msgstr ""
+
 msgid "There are no packages yet"
 msgstr ""