List-site navigation style update

Hey, that sites + textfiled isnt so beautiful I thought, so I've done something better(?) I think.

So, how do you like this.
I prefer the last one^^
And momently it's the last one (coded) in this pull request
I don't know what I also can delete in <code>list_header.inc.php</code>. So If we agree to one of them, one of you should eventually look over it, if there is something to clean due to my changes :-)

And one question.. How should I name the classes for this buttons? I really have no idea.. at the moment it's "navmenu-button, navmenu-border and navmenu-input" for it

Original:
![namenu01](https://cloud.githubusercontent.com/assets/6222200/3450448/b228ccdc-017b-11e4-96f3-55845198d207.png)
First variant:
![namenu02](https://cloud.githubusercontent.com/assets/6222200/3450451/b5b39c88-017b-11e4-9022-a1afc7da5435.png)
Second variant:
![namenu03](https://cloud.githubusercontent.com/assets/6222200/3450452/b83a2bd4-017b-11e4-879d-c15a6e3b3208.png)
Third variant:
![namenu04](https://cloud.githubusercontent.com/assets/6222200/3450453/bb471850-017b-11e4-87dd-02537ace7aa8.png)
Fourth variant:
![navbar lis nav](https://cloud.githubusercontent.com/assets/6222200/3450454/bd6db184-017b-11e4-982e-af9dc9ed29c2.png)