JakeWharton/ActionBarSherlock — pull request #1074 by lionzeye (2013-12-12 11:00:38+00:00)
Title: Force OverflowButton to show, to conform to the expected behaviour in th...

...e latest Android Framework

Here 's why ;)
https://android.googlesource.com/platform/frameworks/base.git/+/ea04f3cfc6e245fb415fd352ed0048cd940a46fe