Show the IP in the UI

[Senyoret1]

Did you run make format && make check?
The go code was not changed. npm run lint and npm run build were used.

Fixes #719

Changes:

• The visor IP is now used as the default label for visors without label.
• The visor details page now shows the visor IP.
• Now the apps list shows a link for opening the UI of the Skychat app in a new tab. For building the URL, the code uses the visor IP and tries to get the port from the app arguments, but if the port is not there, 8001 is used as the default port.

How to test this PR:
To see the default label, just open the visor list, the IP should be shown as the label of all visors without a label set (previously, the default label was just a part of the public key). For checking the IP of a visor, open the visor details page, the IP should be shown in the right bar. For opening the Skywallet UI, open the app list of a visor and press the link button at the right of the Skychat row.

[jdknives]

This works well. Will merge. Need to revisit the implementation on the backend though for MacOS.