clear:both layout fix for @INHERIT TVs

Simple `clear: both` CSS fix in `manager/templates/default/resource/sections/tvs.tpl` to fix the following layout issue:

![editing__home___body_shapers_on_demand](https://cloud.githubusercontent.com/assets/352182/3095941/ec9d6360-e5cd-11e3-836b-dcad2a68fbcf.jpg)

I believe this was introduced with the new [2.3] manager theme updates.