Fix menu flow, Add explanations, Fix menu option values

This places paths inside settings instead of the reverse for devices
that cannot view the slider menu. The configuration options have been
expanded to work toward adding all emu.cfg values as visual
configuration options. There are now guide comments to explain the
different functions when adding new items for the configuration menus.
Fix a copy paste typo to separate dynarec from unstable
Merge pull request #68 from NoblesseOblige/master

Fix menu flow, Add explanations, Fix menu option values