frontend: Console dialog look tuning

This patch tunes look of the console dialog. It adds tooltips to widgets and
slightly changes the layout.

It also fixes a problem when the changes in ConsolePopupView's checkboxes were
forgotten by switching the implementation.

Change-Id: I106de2876e3698d087c7996bfe1cac1f2bc6a19e
Signed-off-by: Frantisek Kobzik <fkobzik@redhat.com>