Add missin localization strings (#3798)

webapp/i18n/en.json

@@ -679,6 +679,7 @@
   "admin.sidebar.logging": "Logging",
   "admin.sidebar.login": "Login",
   "admin.sidebar.logs": "Logs",
+  "admin.sidebar.nativeAppLinks": "Native App Links",
   "admin.sidebar.notifications": "Notifications",
   "admin.sidebar.oauth": "OAuth 2.0",
   "admin.sidebar.other": "OTHER",
@@ -1043,8 +1044,6 @@
   "create_post.comment": "Comment",
   "create_post.post": "Post",
   "create_post.shortcutsNotSupported": "Keyboard shortcuts are not supported on your device.",
-  "flag_post.flag": "Flag for follow up",
-  "flag_post.unflag": "Unflag",
   "create_post.tutorialTip": "<h4>Sending Messages</h4><p>Type here to write a message and press <strong>Enter</strong> to post it.</p><p>Click the <strong>Attachment</strong> button to upload an image or a file.</p>",
   "create_post.write": "Write a message...",
   "create_team.agreement": "By proceeding to create your account and use {siteName}, you agree to our <a href='/static/help/terms.html'>Terms of Service</a> and <a href='/static/help/privacy.html'>Privacy Policy</a>. If you do not agree, you cannot use {siteName}.",
@@ -1285,6 +1284,10 @@
   "ldap_signup.length_error": "Name must be 3 or more characters up to a maximum of 15",
   "ldap_signup.teamName": "Enter name of new team",
   "ldap_signup.team_error": "Please enter a team name",
+  "leave_team_modal.desc": "You will be removed from all public channels and private groups.  If the team is private you will not be able to rejoin the team.  Are you sure?",
+  "leave_team_modal.no": "No",
+  "leave_team_modal.title": "Leave the team?",
+  "leave_team_modal.yes": "Yes",
   "loading_screen.loading": "Loading",
   "login.changed": " Sign-in method changed successfully",
   "login.create": "Create one now",