* Removed the application menu.
* Sidebar: show the property views in expandable sections.
* Thumbnail list: spread the thumbnails horizontally to fill the available
space.
* Video viewer: added option to use opengl instead of cairo.
* Show the rating as a sequence of stars.
* Color picker: use lowercase letters for the hexadecimal value.
* Contact sheet: set the current directory as destination if possible.
* Script dialog: wider list to make all columns visible.
* Use meson as build system.
