Michael Klimushyn 020fd590b0
Prevent dropdown menu's scroll offset from going negative (#22235)
In long lists this resulted in the dropdown scrolling to the very last
item in its list. Now clamping the value at `0.0`. Added a test to
verify that the selected item aligns with the button to test the offset.

Fixes flutter/flutter#15346
2018-09-26 14:28:26 -07:00
..
2018-09-12 08:29:29 +02:00