When FIT_BOTH, FIT_WIDTH or FIT_HEIGHT are selected explicitly by
the user, expand small images to fit the window from inside. However,
when the image is initially loaded, only shrink it if too large to fit;
don't expand it if small unless requested.
When
FIT_BOTH,FIT_WIDTHorFIT_HEIGHTare selected explicitly by the user, expand small images to fit the window from inside. However, when the image is initially loaded, only shrink it if too large to fit; don't expand it if small unless requested.