#297 - Fix action button alignment.

[This is related to #297 and #638.]

For resources dropdown and user summary dropdown, the 'Apply' or 'Add' buttons did not have enough margin and were looking bad.

[I don't know how to make this images smaller, without doing it locally]

#### Agents dropdown:

**Before**

![1_agent_resources_before](https://cloud.githubusercontent.com/assets/172235/4593642/c19db316-5087-11e4-9489-ddc70db09842.png)

**After**

![2_agent_resources_after](https://cloud.githubusercontent.com/assets/172235/4593651/d2a00984-5087-11e4-9809-c75bf6bfce61.png)

#### User summary - roles dropdown:

**Before**

![4_usersummary_roles_after](https://cloud.githubusercontent.com/assets/172235/4593656/d963fb7c-5087-11e4-80ea-6037b80a4f23.png)

**After**

![3_usersummary_roles_before](https://cloud.githubusercontent.com/assets/172235/4593645/c902c358-5087-11e4-836e-a47facb904dc.png)