GCPP v4.30 allows you to add a alternative short title for your posts. This title is used as a replacement of the up to 65 character post title in home page widgets and sidebar widgets.
Longer post titles allow you be more descriptive and can be good for SEO. However, when these titles appear in post widgets they often wrap and when viewed alongside shorter titles the symmetry of the page can be lost making the whole thing look a bit untidy
Using a short title means that you can set up the titles not to wrap and hence the widget area is nicely aligned.
Click for how to set up short post titles