Added more keyboard shortcuts for other wizard screens.
Added more keyboard shortcuts for other wizard screens.

BUG=37068
TEST=Boot so that any wizard is shown. Verify that Ctrl-Alt-{n, u, l, a} switch to network, update, login and account screens correspondingly.

Review URL: http://codereview.chromium.org/1696011

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@45584 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