User:Jayprakash12345/Scripts/AddColonButton
This script will provide you a button () in Edit Toolbar to add colon.
It will work on talk pages.
Installation
editAdd the following code to your Wikimedia Commons common.js page:
mw.loader.load('//meta.wikimedia.org/w/index.php?title=User:Jayprakash12345/Scripts/AddColonButton.js&action=raw&ctype=text/javascript');