No Minimize/Maximize buttons in Gnome 3

I have installed Ubuntu Gnome 14.04

The problem is :

Nautilus(I think it called "Files" in gnome-shell) has no Minimize/Maximize button !

I have enabled gnome-tweak-tool -> Windows -> Maximized/Minimized, but Nautilus has not Minimize/Maximize buttons!

enter image description here

Any ideas?


Solution 1:

hm... Actually there's an option for minimize/maximize it's kinda hidden, when you click on nautilus top panel you get:

enter image description here

I'll add more solutions, when/if I find.