Collapsable Columns in the Browser interface

Please allow for collapsing the "My Vehicles" and "Trips" columns when not in use.   Especially the "My Vehicles" column.    I use a vertically oriented monitor when logging my trips and milage into my accounting software and that column is just large amount of wasted screen real estate that could be used by the maps, even more of a waste considering I only have one vehicle.  

Thanks!