[bug] Listgrid export messes up RPCManager.requestsArePending()

Hi,

I've come across an issue that seems to be a bug.

Version v10.0p_2015-04-19/EVAL Deployment (2015-04-19)

When calling ListGrid.exportData() an RPC Call with Request.transport = hiddenFrame is issued and RPCManager.pendingRpcs gets increased.

But since there's no callback ever fired with hiddenFrame, RPCManager.pendingRpcs doesn't get decreased again.

As I rely on RPCManager.requestsArePending(), which checks RPCManager.pendingRpcs, to display a busy mouse cursor, the application looks as if it's busy indefinitely after an export.

Cheers