Shows 3MB files as hosted on empty / fresh IPFS node

**Describe the bug**
Started a fresh ipfs node and browsed to the webui. On the status page it shows "Hosting 3 MB of files" - "Discovered 1392 peers" (ref. screenshot below)

But when clicked on the files section, it is empty. (ref. screenshot below)

**To Reproduce**
The size usually varies, but start a fresh IPFS node and you would start to see the files count, without having to add any files explicitly

**Expected behavior**
If this "3MB" includes "on the fly" blocks that are being wanted by other peers and just hosted temporarily on the node (which should be the case, since no files are added on the local node directly), two things are needed:
1. clearly indicate the nature of the hosting data. Something like **Hosting y MB of peer data, z MB of local pinned files** etc.
2. when clicked on the "Hosting 3MB of files" link, please display the list of blocks that are making up this 3MB (even if they are just "on the fly" peer data).

For beginners, web-ui is a great tool to understand what is going on, and helping them visually explore the peer data that is being hosted on the local node, is very important for debugging and many other things.

Also, the peers section lists the peers nicely - the geography map is very useful. Similarly, is there any way those peers can be "browsed" to explore which blocks and pinned files they are hosting (assuming they allow) ?

**Screenshots**



**Desktop (please complete the following information):**
- OS: Windows 10
- Browser [e.g. chrome, safari]: Chrome latest

**Smartphone (please complete the following information):** None