Bruker:Vegard Pettersen/common.js:

mw.util.addPortletLink(

'p-personal',
'/w/index.php?title=Special:MyPage/Sandbox&action=edit&preload=Template:User_sandbox/preload&editintro=Template:User_sandbox',
'My sandbox',
'pt-mysandbox',
'Go to your sandbox',
null,
'#pt-preferences'
);