Feature: show saved status in pads

[victorb]

This commits add a simple status indicator that currently shows the following states:

• Saving - State change happened locally
• Receiving - State change happened externally
• Timeout - After receiving a state change from ourself, this happens after SAVE_TIMEOUT_MS, occurs if the pinner doesn't pin quick enough
• Saved - Pinner acknowledged it pinned the current state

However, this commit has a issue where sometimes the stage change event happens multiple times in a row, and the pinned event happens in the middle of those, but not in the end, leading to the Receiving state to be shown until another event happens. Currently trying to reproduce this directly in peer-star-app

See example of bug happening in peerpad here: https://ipfs.io/ipfs/QmUBh45vMG1axbhKdfYqcZqFBU3CM1eVwm6SBdRUPNFri1/stuck-on-receiving.ogv

License: MIT Signed-off-by: Victor Bjelkholm git@victor.earth

[pgte]

@victorb this is great! About the pinned events, I've opened this issue: https://github.com/ipfs-shipyard/peer-star-app/issues/167 I've opened another regarding the state changed event: https://github.com/ipfs-shipyard/peer-star-app/issues/168

[jimpick]

Good stuff!