Update CHANGELOG.md
updated samples for dark and light coloring supporting issue #705
grid header fix for issue #704
fixes for control groups on issue #707
further updates for issue #707
updated dark list colors for issue #705
temporary work around for issue #706
added a pinned item to the dynamic action bar sample
updated change log
fix for pill button issue #679
fix for orientation issue #709 for pill buttons
title bar fix for issue #672
updated the header font in BB10 control groups
final update for issue #706
fix for overflow action show and hide for issue #658
updated label control containers for issue #651
swipe down menu updates for issue #651
moved Q10 styling up in the change log
updated default screen font size for Q10 for issue #651
radio button fix for issue #714