CMakeLists: Increment the minimum required version of wxWidgets
DolphinWX: Implement scrolling in the code view and DSP disassembly view.
Merge pull request #631 from lioncash/scrolling

DolphinWX: Implement scrolling in the code view and DSP disassembly view.
Merge pull request #627 from lioncash/wx-deps

CMakeLists: Increment the minimum required version of wxWidgets