because we are adding the Edit button to the Document tools bar, we can make that bar "Sticky". Is not required, but it could be nice. Wikipedia does not have the Edit button sticky, but is nice to have the edit button always accessible. We need to decide. horacio believes this is not that important now.

we have duplicate tabs now in the document tools and in the accessory panels. we are going to remove the tabs from the accessory panel

we will add an X to the accessory panels, and remove the accessory panel toggle button in the tittlebar.

we will redisign a bit the document tools as shown in the preview