Move hotkey code to separate file

[alfredbuehler]

All Submissions:

• Have you updated the ChangeLog with your proposed changes?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• pr update to master branch
  • Have you updated the getPluginVersion() in Plugin.php and Makefile version appropriately?

New Feature Submissions:

• Have you added an explanation of what your changes do and why you'd like us to include them?

Description

Commit 2c3bc4f breaks the hotkey for wiki. This is the fix.