Better navigation for public folder

[WanyiChen]

I found it quite hard to navigate through my Solid Pod's public folder. A few UI design ideas:

1. Get rid of the x. Currently, when I get to here:
   
   If I click on the x, the page becomes completely blank, and there's no way to restore it. I think it's good to delete the x, since the x does not really make sense here.

2. Have a "home" button to navigate back to this page from the editing pages:
   
   Currently, when I finish editing my public folder, there's no direct way to navigate back to this page to edit other folders.

3. Have a better way to set permissions, perhaps dropdown boxes. Currently this page is not very intuitive:
   
   It took me quite some Googling to figure out that I should drag-and-drop the globe icon. I think at least there should be a line of instruction on this page that says "drag and drop the globe icon to set permissions." Or better, it's more intuitive to use dropdown boxes to set permissions.

I think Solid is a great project, but it can potentially attract more people if it had a better UI!