We want to make KDE sources easy to find, share and build upon; and most importantly we want your contributions to count towards your github profile. :)
Our central repositories are handled by our awesome sysadmins over on kde.org where we have full control and tighter integration within our services. If we start using multiple repositories and making developers look in two places that gets very complicated and unfair on the maintainers.
Also as an open source project, it's very important for us to keep to using open source tools. Github does not meet that requirement.
git format-patch HEAD^to create a diff
The maintainer for this software will then comment and merge your request.
Alternatively you can use the command "arc diff" to streamline the process. More details are available in the Phabricator page.
Please file a bug report or wish at https://bugs.kde.org