Currently, the link to remote GUI uses device addresses as they are
advertised from the router. Because of this, they may end up having a
scope ID attached to them. The problem is that browsers do not support
such addresses, leaving the user with a non-working URL.
Because of the above, use regex to simply filter out the scope ID from
the address before using it for Remote GUI.
Signed-off-by: Tomasz Wilczyński <twilczynski@naver.com>