Restore "JS" suffix after renaming in !3385

src/art/artJS.js

src/debugging/debugJS.js

src/js/accordianJS.js

src/js/assayJS.js

src/js/assignJS.js

src/js/birthJS.js

src/js/colorModeJS.js

src/js/datatypeCleanupJS.js

src/js/economyJS.js

src/js/eventSelectionJS.js

src/js/extendedFamilyModeJS.js

src/js/familyTreeJS.js

src/js/foreachMacroJS.js

src/js/generateNewSlaveJS.js

src/js/hTagMacroJS.js

src/js/pregJS.js

src/js/quickListJS.js

src/js/rbuttonJS.js

src/js/sexActsJS.js

src/js/slaveCostJS.js