v1.1.0

• Theme choice. A System / Light / Dark selector in the status bar. The default follows the
  operating system's mode, and the choice is remembered between runs.
• The window keeps itself on screen. On a scaled display the default window size could exceed
  the screen, and centring it then pushed the title bar off the top edge, leaving the window
  impossible to move, minimise or close. The window now shrinks to the working area and centres
  inside it.