Fixed some layout for pre-L and added empty message

Added empty message for account screen
![device-2014-10-25-143640](https://cloud.githubusercontent.com/assets/866735/4779036/b477de78-5c12-11e4-92df-d6ddc328d8ba.png)

The calculator buttons were small in Kitkat, fixed it to fit the layout.

Old
![device-2014-10-25-144257](https://cloud.githubusercontent.com/assets/866735/4779037/b670b0d8-5c12-11e4-83d0-b6a2c5cf90a8.png)

New
![device-2014-10-25-144321](https://cloud.githubusercontent.com/assets/866735/4779038/b95a6924-5c12-11e4-8970-f494b84d1b84.png)