When you right-click the message, it will allow you to open the URL and visit the relevant forum thread. You can also dismiss the message to stop its display.
By default, broadcast messages will only be displayed for 5 minutes after logging in, after which they will automatically disappear on their own.
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Additionally, you can now use "Ctrl-V" to paste the contents of your computer's clipboard into a prompt (for example when searching an item on the G.E.). You could already use "Ctrl-V" to paste clipboard contents into your chatbox, now it also works for other prompts.