Add important to sul-toolbar border style (blacklight styles w/ ID).


#### Results before
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![results-toolbar-before](https://cloud.githubusercontent.com/assets/96776/3632670/c6748446-0ec9-11e4-9525-b5edcef4863b.png)

#### Results after
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![results-toolbar-after](https://cloud.githubusercontent.com/assets/96776/3632669/c674479c-0ec9-11e4-82c2-d25a29dc9d2b.png)

#### Record after
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![record-toolbar-after](https://cloud.githubusercontent.com/assets/96776/3632668/c6730332-0ec9-11e4-830c-5431365085db.png)