hasZeroLTVCollateral edge case

[defispartan]

The UI currently shows an error message where an address has a reserve enabled as collateral, but the reserve has zero LTV so collateral must be disabled before another action can be performed. However, this error only shows if the address has a non-zero balance of that reserve.

If a reserve is enabled as collateral for an address AND the reserve zero LTV AND the user balance is zero:

• The error message should be shown in all transaction modals
• Reserve should appear in SuppliedPositionsList to allow address to disable the reserve as collateral