Improvment of mediapickers filebrowser

It is quite annoying that the file browser of the mediapicker always jumps back to the root directory, instead of staying in the gobo, color, whatever folder, when adjusting the next item. :( It would be extremely time saving, if it stays in the last used folder, when adjusting several items of one kind.
Then it would be very helpful if there would be a better possibility to choose preview graphics. If you for example search a certain gobo and you don't know it's filename you arecscrolling yourself to death, while searching it. Maybe a bigger or resizable window and a kind of icon view, like it is in Microsoft Explorer, could be the solution? :-?