Such patch seems to be missing to achieve the desired behavior to auto
reformat a paragraph with enabled static word wrap.

The reformat takes without this patch only place when text is added but
not removed.

• Enable static wrap
• Enter enough text to force auto wrap over a couple of lines
• Add at some point in the middle of your text a "hard wrap/new paragraph" by simply press ENTER
• Add in the upper paragraph more text -> lines below will auto reformat down to "hard wrap"
• Remove new added text by DEL -> with patch paragraph gets reformat too
• New behavior also affects text which was wrapped by "Apply Word Wrap" when static wrap is off, but for me is that's fine
• It's looking similar as done at other places but I'm not sure if it's best this way due to my goals mentioned elsewhere
• In current state can this patch crash when do "undo"