UI for more extensive app configuration

Dear Users,

You may notice many more settings in the Application builder starting today.
These give you access to the many settings that the CommCare mobile client
supports. If you don’t want to deal with the settings, then everything
should stay exactly the same as it was before this UI, so they do not
require any immediate action. I have tried to include a good description of
what each setting does, which you can get to by clicking on the [?] link
next to each. (Click [?] again to make the help text go away.)

Let us know what you think, and if there are any issues. Otherwise, enjoy!