Accounting Import; current restrictions on number of attempts to open import batch increased.

An Accounting Import has restrictions on the number of times it attempts to open an import batch, where a Batch Id has not been specified. Currently if there are more than 11 saved batches, ie. with Batch Id range of "Imp" - "Imp10" inclusive the import will fail with a "Batch already exists." message.

The number of attempts has been increased to 100 (ie. "Imp99").