Add FunctionBreakpoint & Add Exception Catchpoint commands

Also had to introduce CommandEntryDisplayType to change displaying so it's possible to display Icon and text in pads e.g:"Add FunctionBreakpoint & Add Exception Catchpoint commands"
![image](https://cloud.githubusercontent.com/assets/774791/3714551/89dd00b6-15af-11e4-8091-e9b035cc8536.png)

@vaclav: Maybe you want to add icon for adding catchpoint...