At the moment building requires alway to clicks to get to the menu. Changing from building to recruiting also needs two clicks. This could be easily remedied as shown in the image below.

So instead of showing the building submenu including a button to actually build, we simply open both menues at once, so showing the available buildings as well as the currently built buildings. Therefore we no longer need the button to open the "available building widget" and can even show one more item of the queue.

Additionally we retain the texts buttons to simply change to recruiting or other tabs of the city menue. The same of course for the recruiting menue.