Styling to make the dialogue screen connections easier to follow
Move non-css dialogue screen styling into its own module
Improve dialogue connections' endpoint cursor types
Prevent #diagram *:not() from overriding jsplumb css declarations
Fix module title comment in go.components.dialogue.style
Change the dialogue screen's styling to not need :not for z-indexing
Merge branch 'feature/issue-454-dialogue-connections-need-to-be-easier-to-follow' into develop-frontend