Open a new tab with your site on the top tool bar. Right click and 'copy' the entire address shown. Now just paste it to create a 'link' It should appear a different color and with one 'click' open a new tab (select that) taking you to your site.
Now I just figured this out yesterday so experiment with this concept, you can always edit if not working.
*Not sure but a while back it took Megan from the administration to change the signature box, they may allow you to now...
When the link is working the link above will be highlighted^^^ (left of the smiley face thingy)