Symphony: check both unseen, total renewals left

Add a check for total number of renewals remaining when checking whether an item can be renewed.

The total number of renewals remaining (the values renewalsRemaining and renewalsRemainingUnlimited) govern, even if unseen renewals remain, or are unlmited. That is, Symphony treats unseen renewals as limiting the conditions in which a renewal can take place, not a separate type of renewal that can be performed without the item in hand.

Refer to SirsiDynix KB #131608 for additional details.