the theme API currently has no control over jQuery loading

the expected behavior is that when a theme specifies jQuery, that jQuery 3 will load into the global JS scope of the page. currently stack jQuery along with the user compatibility settings control which versions are loaded, and all jQuery is loaded with the "no conflict" settings clearing out the $ and jQuery global variables.

the correct behavior should be that when a theme requests jquery 3 that the jQuery 3 loads in regular mode and leaves the global $ and jQuery variables in-tact.