Add support for Shifter in YUI files, fix several JSLint errors

...ilter/moodle-block_course_overview_campus-filter-debug.js

...-filter/moodle-block_course_overview_campus-filter-min.js

...mpus-filter/moodle-block_course_overview_campus-filter.js

...e/moodle-block_course_overview_campus-hidecourse-debug.js

...rse/moodle-block_course_overview_campus-hidecourse-min.js

...ecourse/moodle-block_course_overview_campus-hidecourse.js

...ews/moodle-block_course_overview_campus-hidenews-debug.js

...enews/moodle-block_course_overview_campus-hidenews-min.js

...-hidenews/moodle-block_course_overview_campus-hidenews.js

yui/src/filter/build.json

yui/src/filter/js/filter.js

yui/src/filter/meta/filter.json

yui/src/hidecourse/build.json

yui/src/hidecourse/js/hidecourse.js

yui/src/hidecourse/meta/hidecourse.json

yui/src/hidenews/build.json

yui/src/hidenews/js/hidenews.js

yui/src/hidenews/meta/hidenews.json