Would it be possible to make it so that when I left click and select a unit on the map I could then right click the city in my city tree (on the left side of the screen) that I want that unit to go to?  It would also be nice to be able to left click a unit in the unit tree and then right click the city I want it to go to in the city tree.

 It gets tiresome having to select a unit that is trained on one side of the map and then scroll to the other side of the map to have it travel to a city over there.  Is there some easier way to do this (i.e. rally points?) or am I missing something?