collection detail page grid fix (bug 1096649)

@cvan was right the regression was made with the app tile `.info` width fix but that patch corrected many other issues so I'd rather keep it. Below should be every relevant page (with an app tile) tested but I was sure I tested this earlier when the regression happened.

![](https://cloud.githubusercontent.com/assets/391260/4986546/62485bd2-693c-11e4-8766-0c579cbfc320.png)

![](https://cloud.githubusercontent.com/assets/391260/4986549/6bd77c0a-693c-11e4-8f1b-3791a9a57bd8.png)

![](https://cloud.githubusercontent.com/assets/391260/4986552/777f8598-693c-11e4-9892-64d073390bab.png)

![](https://cloud.githubusercontent.com/assets/391260/4986558/8968c72e-693c-11e4-8bc2-715a7de923d7.png)

![](https://cloud.githubusercontent.com/assets/391260/4986559/8fb2710c-693c-11e4-91e6-201f8cc46398.png)

![](https://cloud.githubusercontent.com/assets/391260/4986563/945f698a-693c-11e4-81e8-8971a70229e3.png)

![](https://cloud.githubusercontent.com/assets/391260/4986566/9b5c3b28-693c-11e4-8f42-9b52a7db7327.png)

![](https://cloud.githubusercontent.com/assets/391260/4986569/a0f292ee-693c-11e4-9806-9ce1d07050e2.png)

![](https://cloud.githubusercontent.com/assets/391260/4986576/a68d2480-693c-11e4-98d7-7ad701264179.png)

![](https://cloud.githubusercontent.com/assets/391260/4986579/aace0bb8-693c-11e4-9a1f-1edae26c866f.png)

![](https://cloud.githubusercontent.com/assets/391260/4986585/b2f86d9c-693c-11e4-9f60-c0d21b5f80a5.png)

![](https://cloud.githubusercontent.com/assets/391260/4986588/b74c92e2-693c-11e4-8b1f-4dc77fe5db01.png)

![](https://cloud.githubusercontent.com/assets/391260/4986593/bb7c2990-693c-11e4-9bad-b60db3ab8b7e.png)

![](https://cloud.githubusercontent.com/assets/391260/4986595/bf3c7b52-693c-11e4-82ac-d1bc1bd06db5.png)

![](https://cloud.githubusercontent.com/assets/391260/4986596/c32d264e-693c-11e4-80e5-c2a9fa4b932a.png)

![](https://cloud.githubusercontent.com/assets/391260/4986598/c6f081c2-693c-11e4-8c44-bbbf10802ec4.png)

`.grid-if-desktop` is honestly something I tried to remove in the bigger PR I did like a month ago but realized only the cat detail pages on desktop use it and everyone seemed to prefer it this way (I had it as a two-column app tile listing). Its use here is simply to override some of the base tile definitions.

In the new mocks all listings pretty much look the same and the only "grid" will be on some of the feed elements. This will definitely be nuked then and it's a weird one-off now.