[BUGFIX] Carousel: Enable rendering of optional Caption
[TASK] Don't show caption box when caption is an empty string

Care about "emptying" a previous existing text, RTE sometimes forgets deleting <p> tags, be sure to empty the field completely!
[FEATURE] Carousel: Enable header-only caption
Merge pull request #36 from mihawk90/carouselCaption

[BUGFIX] Carousel: Enable rendering of optional Caption