GUI: ui.attrlist: Clear "keypress_hack" attr_name when adding attribute (bnc#806986)

Signed-off-by: Tim Serong <tserong@suse.com>
GUI: status: Record current status page in long-lived cookie (bnc#710931)

Signed-off-by: Tim Serong <tserong@suse.com>
Misc: ApplicationController: Default to browser locale (don't use cookie, bnc#806371)

Signed-off-by: Tim Serong <tserong@suse.com>