Manage MEDs Dialog Should Not Have A Browse Button

To display the Manage MEDs Dialog, you select a model in the Model Explorer and use the appropriate context menu. Once displayed the dialog allows other models to be selected. If another model is selected using the "Browse..." button of the dialog, the MED changes already made to the previously selected model are lost. The best approach would be to just remove the "Browse..." button and only let the dialog pertain to the initially selected model.