Per currency selection not operative

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I have several currencies in my shop and regarding that Paypal doesn't accept some of them I would like to disable the module for this currencies and select a different one.

 

But at Currency restrictions the column for Paypal only shows radio buttons and this means I'm forced to select "Customer currency" because the other options would disable the module for all other currencies.

 

I just want to have checkboxes in the column like with the other payment modules I'm using (2CO, bank wire, credit card).

 

Is it possible to change the radio buttons for checkboxes in this column?

 

Thanks.