Fix/select btn storage modal

@tejohnso this is the proposed fix for the Storage Selector button disappearing on small window size.  It includes a button that appears with the upload and new folder to select for mobile users.  Also I added that convenient button on the bottom for list of items 10 or longer.  That way the select button doesn't appear twice on empty or small lists.  please review and give me feedback on the design decision for the bottom button