Fix gridsystem for mobile devices

[frdmn]

This PR contains a fix for the gridsystem which is messed up on the smalles media query for mobile devices.

Before:

After:

[frdmn]

I'll try to get turn the feature articles into an <ul> list, to bring back 2 per rows.

[frdmn]

No need for that <ul> got it all working :)

[ghost]

Still a few things that need to be fixed. I'll do this when i get time :smile: Thanks @frdmn

[ghost]

Can we delete the branch?

[frdmn]

oh sure!