desktop-goodies: change terminal icon

Use terminal icon name that is common for ubuntu and gentoo.

Signed-off-by: Aliaksei Katovich <aliaksei.katovich@gmail.com>
desktop-goodies: irssi: pass pid to script

Pass pid to irssi-notify-msg script.

Signed-off-by: Aliaksei Katovich <aliaksei.katovich@gmail.com>
desktop-goodies: irssi: update term icon

Update terminal icon upon message arrival/departure so it is easier to spot
relevant window from xwinlist.

Signed-off-by: Aliaksei Katovich <aliaksei.katovich@gmail.com>