uix:BoxLayout account for padding while using pos_hint
uix:BoxLayout remove debug statements
Merge pull request #2588 from kivy/boxlayout_pos_hint

BoxLayout honour padding when using pos_hint
make legacy FileChooser views work again
Merge pull request #2589 from kived/filechooser-legacy-fix

make legacy FileChooser views work again
doc: typo fix in splitter.py