Atspi.Component.set_size and set_extents doesn't shrink window
##Steps to reproduce
- start any application
- run accerciser and select window of that app
- in accerciser console try to shrink the window, for example acc.set_size(100, 100) /if the window is bigger than 100x100
set_size will succeed, but window won't be shrinked. However expand works properly.
set_size should also shrink the window
affected version <= 2.28.0