Add tooltip explaining funding

[daunatv]

Story

Funding in console is shown as positive or negative, but this is not a clear description of what it means, user can assume - just means that they will pay, even thought they are on a long. A mousover info could help, something like:

Acceptance Criteria

• [ ] I can see who is expected to pay next funding with an explanation (text below)

Additional Info

When positive:

"The funding rate represents the difference between the mark price and the index price and drives alignment between the two.

At the next funding settlement, longs will pay shorts at a rate of funding rate"

When negative:

"The funding rate represents the difference between the mark price and the index price and drives alignment between the two.

At the next funding settlement, shorts will pay longs at a rate of funding rate"