Updates grill sprites to tile better, fixes standard window looking like complete ass

Vote here for what looks best on grills:
https://tgstation13.org/phpBB/viewtopic.php?f=10&t=2058
One of them is the old one.

Current:
![](http://puu.sh/d1g5X/c6d31c19ee.png)
In this PR currently:
![](http://puu.sh/d1fZL/ff7ccb3ae5.png)

 

  

Windows:
![poop](http://puu.sh/d1rMr/99a31c3f4f.png)
Right is current, left is new standard window. Unchanged is reinforced, shown bottom right for comparison.