Missing message keys in messages files

Please add the following message keys to the message files to define that message and show it on Special:AllMessages.

• watchlist-summary (Core, MessagesEn.php)
• cite-summary (Extension Cite, SpecialCite.i18n.php)
• gadgets-definition (Extension Gadgets, Gadgets.i18n.php)

Thanks.

 Done Thanks for the report. Done with mwr:111855 and mwr:111856.