Add "Estimated Profit" counter

[sirbeefalot]

We need to improve how we display our value to our users.

Right now there's little feedback and a good chunk of our more savvy users are using other tools to track the value generated by Beefy. This can range from the BIFI deposit telegram bot, to https://www.yieldwatch.net/ .

The problem is that a good portion of our users either doesn't know about these initiatives, or would prefer to see the value displayed right within the app.

I feel like having more indicators of value, gamification, etc, could increase UX substantially. This increases user retention and decreases friction.

We don't need to reinvent the wheel. It would be enough to see how those platforms are tracking value and do the same. I think that accepting that the estimates will break if someone transfers mooTokens is okay too.