Update composer.json
output system messages in listings
fix showColumn handling
Merge pull request #123 from backbone87/dev

output system messages in listings
Merge pull request #124 from backbone87/fix/showColumns

fix showColumn handling
Merge branch 'origin/dev'

Conflicts:
	composer.json
	system/modules/generalDriver/templates/dcbe_general_listView.html5
	system/modules/generalDriver/templates/dcbe_general_listView_sorting.html5