text: Title: GUI not starting
  Body: ## Classification:
  
  Bug
  
  ## Reproducibility:
  
  Always
  
  ## Version
  
  AutoKey version: 0.95.2-1.fc29
  
  Used GUI (Gtk, Qt, or both): Gtk
  
  Installed via: dnf
  
  Linux Distribution: Fedora 29
  
  ## Summary
  
  Interface won't shows up.
  
  ## Steps to Reproduce (if applicable)
  
  - $ autokey-gtk --verbose
  
  ## Expected Results
  
  - Application should start
  
  ## Actual Results
  
   - No interface created.
  
  ```
  https://pastebin.com/XyNx27Cd
  ```
  
  ## Notes
  
  ![screenshot from 2019-02-01 20-44-51](https://user-images.githubusercontent.com/40907224/52146540-4f44ba00-2664-11e9-8a9a-3bd61a2f75af.png)