Import Enhancement: Tab- Line Items: Being able to select Multiple, All, or blank "Mapped to"

Currently when Mapping a file, view, or similar, if you have extra line items/columns, Anaplan doesn't always identify that a new line item is selected, and takes multiple attempts to have your selection identified. (Bug, and I use Chrome with 90% zoom)

Being able to Map everything you are going to map, then select all unmapped and hit ignore would make mapping line items infinitely more convenient, and far less frustrating.