Show what happens when trying to load a remote CID

[momack2]

Describe the bug
Tried to view a CID that's stored on pinata - loaded forever and the rest of the screen became unclickable / frozen - had to quit the app

To Reproduce
Steps to reproduce the behavior:

1. Search CID in the address bar
2. see ipfs loading logo
3. try to click on anything else on the screen
4. See error

Expected behavior
Does not freeze, able to navigate away

Screenshots

Desktop (please complete the following information):

• OS: macOS catalina
• Browser chrome
• Version 89.0.4389.114

[lidel]

Notes from triage:

• ipfs-webui should be smarter about content that is not in local datastore
• if it is not in local cache, show new page for "looking for content"
  • details TBD, rough ideas:
    • always show "cancel" option (js-ipfs-http-client now supports AbortSignal)
    • > 5s provide information that content is not present on local node and is being loooked for
      • bonus: we could visualize the DHT walk – see Show how DHT locates providers for unknown CIDs #1843
    • >ns "taking longer than expected, would you like to manually connect to peer" + input
• see if we can proactively detect CIDs "broken by a typo (desktop find file bug #1739 (comment))