jmotad

Wrong offset makes expanded twist button being unsmoothly drew

1

**wxPython version & source**: 4.1.1 & /wx/lib/agw/customtreectrl.py **Description of the problem**: In /wx/lib/agw/customtreectrl.py, while drawing expanded twist button, offset 6 is used to calculate button[2].y, that makes the button is...