Also, always show the apps section. We were only hiding it when
there was zero elements when we were in our transitionary
phase. To make this look less weird when there are actually
zero elements, add the webstore element to the miniview and
closed menus.

BUG=64737
TEST=In a fresh profile, go to chrome://extensions/ -> developer mode,
and click 'update now'. Go to NTP. Should see default apps. Remove
all default apps. Apps section should remain. Collapse apps section
by clicking heading. Should see webstore item in minimized view. Hide
apps section by clicking 'x'. Should see webstore item in closed
section menu on bottom of page.

Review URL: http://codereview.chromium.org/5804005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69180 0039d316-1c4b-4281-b951-d872f2087c98