BMC#19680 Unable to scroll gmail Moveto droplist
BMC#19680 Unable to scroll gmail Moveto droplist

Because this scenario has both mouse move and scrollable listener,
in the rwhv, mouse move and scrollable handler is mutex, so browser
run into mouse move handler.

According to touch move, mouse move and mouse wheel event for scroll
are coexist, so fixed this bug by change their logic as "NOT MUTEX".

Review by ningxin & yongsheng.

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser