text: Title: Feature request: Error message and Python major version number
  Body: ## Classification: Feature (New), Enhancement
  
  ## Reproducibility: N/A
  
  AutoKey version: 95.4
  
  Used GUI (Gtk, Qt, or both):  Both
  
  Linux Distribution: Linux Mint 19.1
  
  ## Expected Results.
  
  Make: Please make the error message to be accessible by a button on the toolbar.
  And please indicate the Python major version number on the 'About AutoKey' box.
  
  