Adds Inter font and uses it as the default for the web UI.
Creates a new /assets folder to house the /fonts, and moves /icons
to live here too.
Updates #10261
Signed-off-by: Sonia Appasamy <sonia@tailscale.com>
When the viewing user is accessing a webclient not over Tailscale,
they must connect over Tailscale before being able to log into the
full management client, which is served over TS. This change adds
a check that the user is able to access the node's tailscale IP.
If not able to, the signin button is disabled. We'll also be adding
Copy here to help explain to the user that they must connect to
Tailscale before proceeding.
Updates #10261
Signed-off-by: Sonia Appasamy <sonia@tailscale.com>