JimEvans: Adding guard for EnablePersistentHoverCapability in .NET InternetExplorerOptions.AddAdditionalCapability().
JimEvans: Adding guard for EnablePersistentHoverCapability in .NET InternetExplorerOptions.AddAdditionalCapability().

r18369

krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate