tinymce and responsive line-breaks (short words after a period)

With the advent of many different screensizes, manual line ending (not sentence-endings) has become a bit of a guessing/repetitive task. I want to avoid having the first short word of a new sentence on the ending of the line all by itself on smaller screens.

After a period, at the start of a new sentence, is there a way to make 1, 2 or 3-letter words be followed automatically by a non-breaking-space instead of a normal space in tinymce?