Steps to reproduce:

• When a quote is created and saved there is a currency symbol added.
• Editing this amount with currency symbol included, results in a currency symbol and an amount of zero.
• If the amount is changed and the currency symbol is removed while editting, the correct amount is saved.

Even when the amount is not changed, but the discription is, the amounts are zero'd.

In the invoice part, there is no currency symbol added.