Show the full extension information in the extension controlled setting bubble for Default search engines.
Also fix the glitch where the bubble popping up from the Default Search Engine list (DSE) appearing behind a selected row in the Other Search Engine list (OSE). That is fixed by making the OSE list have a lower z-index within the stacking context than the DSE.
BUG=314507
R=dbeam@chromium.org
Review URL: https://codereview.chromium.org/
181293005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255931 0039d316-1c4b-4281-b951-d872f2087c98