detect pan release gesture
bugfix: adjust coordinates of pan gesture
bugfix: detect pan release to update flipping page on which the page
calculation of the following flip is based.
add last documents menu entry
adapt confirmbox to button widget changes
fix crash in wtest.lua
handle nil width for button widget
Merge pull request #785 from chrox/flip_fix

bugfix: detect pan release to update flipping page
Merge pull request #786 from houqp/new_ui_code

add last documents history and fix wtest.lua
dismiss chrome bar before launching the reader