Use keyboard navigation on My Files and Bookmarks and Tags

When I use a keyboard shortcut to view Files/Bookmarks/Tags I expect to be able to use up and down keys to choose/highlight an item, and enter to select it. Instead I have to use the mouse, which makes the keyboard shortcut somewhat redundant.
Could you change it so that we can can use and down to highlight an item and enter to select? (I know you can use keyboard shortcut to bring up a search box, but stillā€¦)