Bulk Import allow for Multiple Category Selection

When importing multiple file documents such as PDF, allow for multiple categories to be selected. At this stage, you can only select the one category which has to be the same category for all files you are importing together. 

For example, bulk importing PDF forms where I want them in two different categories, one category might be discipline/aircraft specific, the other might be where ALL forms are available. I now have to go into each form and add the additional category which is time consuming.

I'd also like to add, if you're bulk importing and click out of the 'Add File Document' window accidently you lose everything and have to restart. It would be great to have this changed so if you do click out of the window, the window stays there.