dom-ui settings: Don't allow click sub-page closing when an overlay is visible.
dom-ui settings: Don't allow click sub-page closing when an overlay is visible.

BUG=none
TEST=Verify clicks don't close sub-pages when an overlay is visible.
Review URL: http://codereview.chromium.org/6375006

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@72028 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

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