Give - Currency Switcher 2.0.3

* Fix: Adjusted a JavaScript conditional check to prevent a JS error when Currency Switcher is not enabled on a donation form.

* Fix: Resolved an issue with Currency Switcher not properly setting the currency when only one currency is supported by a particular payment gateway.
* Fix: When a logged in donor's preferred currency was auto-switched there was an issue with the donor then giving a custom amount in that currency that has been fixed.
* Fix: Resolved an issue with currency formatting the total amount correctly when the donor switches the payment gateway.
* Fix: An "Invalid amount" notice would display incorrectly when using custom currency amount in a multi-level donation form. Now no incorrect errors will display.

* Fix: Resolved a bug where an invalid amount notice would appear for donors who submit a donation where the converted currency donation amount is equal to a donation level of the base currency.