Changelog:

• A fix for applications not launching
• Show a more helpful error instead of "KeyError" if the extension controller is not registered when trying to change the application preferences.
• Added supports for more variants of github extension URL

Signed-off-by: Algent Albrahimi <algent@protonmail.com>

• Launch different softwares using this ulauncher.
• Use shortcuts:
  • g to search google.
  • wiki to search wikipedia.
• Install different extensions like:
  • Process Murderer to kill different processes.
  • Github to search gists and repos. This requires the installation of python-pygithub.