After the 2015 July updates to ArcGIS Online, the Web App Builder's splash screen widget formatting is broken.
I am no longer able to left or right justify any text because it creates a unaesthetic result. The text hugs the edge of the splash screen box. This behavior did not exist prior to the update.
You just need to type several longer sentences to create a paragraph for the Splash Widget. Then Left Justify the paragraph. The goal is to have a left justified paragraph in the Splash Widget that isn't slammed against the side of the frame with no spacing. Before the July updates, this was possible.
Below I have included a screen snapshot of a fake sample splash widget with a paragraph and a photo.