Fix highlight of the transaction under point
Fix highlight of the transaction under point

When a transaction is being added the previous one is highlighted.
Solve the problem checking that the highlighted region contains the
point.

afh/ledger,ledger/ledger,ledger/ledger,ledger/ledger,afh/ledger,afh/ledger,ledger/ledger,afh/ledger,afh/ledger,ledger/ledger