Show edit button in toolbox blocks when in non-category mode

# Before

![image](https://cloud.githubusercontent.com/assets/206973/5290104/d5d4f696-7af8-11e4-93e9-e84e6a881878.png)

# After

![image](https://cloud.githubusercontent.com/assets/206973/5290106/da0c43f4-7af8-11e4-8510-0e72e82c1e21.png)