Header menu problem

Hi! I have some problem with the header menu. First: I disabled the Search icon on the right side. This okay. But i want align my menu to center. I cant do this. https://p1.picsto.re/B3Hmd.jpg The second problem is the indicator of the dropdown menu. My "Iskolánk", "Sikereink" etc menu is a dropdown menu, but this is not clear to the visitor. How can i put there a dropdown icon? Thank you for your answer