Issues on full sync startup

[deffrian]

Description
We have two problems on startup during full sync:

1. It's impossible to stop the node with Ctrl^C after restart.
2. If we have unprocessed blocks from last run we wait for full sync before we fully start the client. It's very unfortunate if you want to do something with old block like calling rpc.

Steps to Reproduce
In order to replicate the behavior, please provide a detailed list of steps:

1. Wait for Download stage and wait for some blocks to get downloaded
2. Restart
3. Try to stop the node

[vortex-hue]

Hi @deffrian , please can I get assigned to this issue please?