Cleaning: Cabal: keera-hails-mvc-view-gtk

[myroslambda]

The cabal files in this repo are not fully conformant with our own style guide for cabal files.

In particular, the following file breaks some rules related to line breaks:

https://github.com/keera-studios/keera-hails/blob/develop/keera-hails-mvc-view-gtk/keera-hails-mvc-view-gtk.cabal