show status based on validators, rather than market

[Ivshti]

Rather than showing the status from the market, calculate it from data from the validators directly.

We'd still use the Market status for showing campaigns, but we will calculate our own when you enter the campaign details.

solves two problems:

• having to trust the market
• status updating slower, cause of the market's crawl cycle

It can be done in one request via this: https://github.com/AdExNetwork/adex-validator/issues/167

[Ivshti]

There's no need for this with V5, similarly to #74, the Platform won't care about the underlying channel status initially

When checking the status is eventually implemented, we can also use that to show a warning to the user to withdraw their funds.