Guacamole 1.6 renders .button.home/.button.logout/.button.reconnect icons
via an absolutely-positioned ::before pseudo-element with width:1.8em
and background-position:.5em .45em. The Blue Jay branding CSS was
clamping every .notification button::before to display:inline-flex
and width:1rem, so only the top-left sliver of the sprite rendered —
appearing as a green/purple garbage rectangle on the connection-not-found
page Home button. Reconnect escaped because it doesn't carry a
background-image on its ::before. The rule was redundant anyway: the
.notification button flex row + padding already spaces the native icon
cleanly. Only the custom .fc-embed-logout-disabled::before override
remains (intentionally dims the replacement disabled-logout pseudo-element).
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