Disable the remove button in the history page when no entries are checked.
Disable the remove button in the history page when no entries are checked.

This also fixes a bug where we could end up with two sets of buttons after a reload.

BUG=37804
TEST=Go into edit mode and select and deselect a bunch of entries. The disabled state of the remove button should be in sync.

Review URL: http://codereview.chromium.org/815001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@41172 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