admin - some bug fixes

added an indicator class to elements using showLoading to easily run
hideLoading thru a context (such as after as ISE or some js error
occured).
updated mediaLib to nuke all showloadings inside itself on load.
updated supplier interface.  New FORMAT for FBA.
Fixed bug in product finder that occured when setting an
attribute/prodlist for a product. save occur, but concurrent product
update did not.
Fixed bug in product editor variations save (didn't update variations
interface w/ changes).
added a new change event to the form delegated events model for setting
another inputs value based on a selection made (ex: choose FBA as FORMAT
and supplierid set to FBA).