Add a column named 'Link status' to the Network tab in SystemMonitor
showing the speed and duplex if the link is up.
Add the link speed behind the existing text in the applet or show
'down' if the link is down.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
