Creating custom build

Creating custom build

I want to create a custom build using JQM download builder, and I have some questions:

Under "Forms"  there is:
Applies button styling to links
If I exclude this for my download, is that mean I won't have 'ui-btn' and 'ui-btn-active' for links (<a> tags)?


If I give up "content management", under navigation, what are the influences? I never use the "pagecontainer" widget, but is it really needed?
Under "core" what does these do:
Defaults  Default values for jQuery Mobile
Helpers   Helper functions and references
I nit  Global initialization of the library.


Transitions:
all the transition which state  Animation styles and fallback transitions definition for non-3D supporting browsers
If I exclude all of these (means only four first options will be checked under Transition) - is that mean no transitions at well?
In general, which mobile devices needs this fallback?

Degrade Inputs-  If I give up this, means I don't give up any widgets, but only the auto-init of form elements?

Under Utilities -
Are 'nojs' classes needed? what are they exacly?