true
Use a native window for the view
On X11, using native GdkWindows enables use of 30-bit Visuals
(that is, 10 bits per channel), at the cost of disabling
double buffering.
false
Use a dark theme variant on start-up
true
Show the browser's sidebar
true
Show a toolbar in the browser view
true
Show a toolbar in the image view
'Normal'
Thumbnail size to assume on start-up