Missing balance "quicklook" function

In previous versions, one can hover on the balance value on the top right corner of the ui to see breakdown of the value in all assets. This function is now missing, so one will have to go to dashboard to check them. Moreover, the old hover automatically includes all margin positions and open orders, and it was the only way to do that. Now one will have to do the sums himself.

Please consider bringing back the quicklook function.

Start by locating the current balance display in the UI and the dashboard calculations for assets, margin positions, and open orders. Compare their behavior with the described previous hover quicklook; done means the top-right balance again exposes the complete breakdown without requiring manual sums.

Written by the indexing model from the issue text.