version 3.9.1
-------------

 New features and user visible changes:

  * Added ability to customize the keyboard shortcuts.
  * Added a shortcuts window to show the available shortcuts.
  * Added option to change the mouse wheel action.
  * Image viewer: added ability to define the transparency style.
  * Video viewer: allow to view the video at the original size; show the zoom
    factor in the statusbar.
  * Edit comment/tags dialogs: use the header bar; allow to change the current
    image from the dialog.
  * Add to catalog: use the header bar; allow to change the current image from
    the dialog.
  * Search: added ability to search in multiple folders.
  * Scripts: added %T to insert a timestamp in the command.
  * Folder tree:
    * better drag&drop support: allow to move a catalog into a library, and a
      library into another library, show an error if the drop operation is not
      possible;
    * added an 'Open in Terminal' command in the context menu.
  * Overwrite dialog: show video previews as well, fixed dialog size.
  * Preferences: allow to specify a catalog or any other location as startup
    location.
  * Trash/Delete files: show progress for long operations.
  * File properties: added the file size in bytes.
  * File properties: added a context menu command to customize the visibile
    properties.
  * Toolbar: show edit comment/tags in browser mode as well.
  * Export tools: removed from the toolbar.  Some tools moved to the tools
    menu, others as a submenu in the gears menu.
  * Fixed window size when started the first time.
  * Updated app icon to follow the new GNOME style.
  * Rewritten README in markdown, updated screenshots.
  * Appdata: added release and OARS tags for flathub compatibility. (Tobias Mueller)