EranMes: Fixing issue 1950, hover broken on Firefox 4 / Linux. Reverting to the default behaviour, where the middle of the element will be used as default coordinates if no coordinates were specified.
EranMes: Fixing issue 1950, hover broken on Firefox 4 / Linux. Reverting to the default behaviour, where the middle of the element will be used as default coordinates if no coordinates were specified.

git-svn-id: aa1aa1384423cb28c2b1e29129bb3a91de1d9196@12656 07704840-8298-11de-bf8c-fd130f914ac9

jmt4/Selenium2,jmt4/Selenium2,jmt4/Selenium2,yumingjuan/selenium,jmt4/Selenium2,yumingjuan/selenium,yumingjuan/selenium,jmt4/Selenium2,yumingjuan/selenium,jmt4/Selenium2,jmt4/Selenium2,jmt4/Selenium2,yumingjuan/selenium,yumingjuan/selenium,yumingjuan/selenium,yumingjuan/selenium,yumingjuan/selenium,jmt4/Selenium2