MDL-43322 JavaScript: Include moodle-core-popuphelp in the mcore rollup
MDL-43322 JavaScript: Include moodle-core-popuphelp in the mcore rollup

moodle-core-popuphelp is used on every page in Moodle, so it should be
included in the rollup by default to save a request each time.

dilawar/moodle