Merge the three separate Toasties?

[mrapacz]

Type

Refactor

Current behaviour
As for now we have three separate Toasty messages, addToast functions and toastyConfigs. Perhaps we could merge them. But should we try to? On one hand, right now we are able to have different notifications in different subpages. Is that of a value to us or not? Perhaps we could leave the configs separated, but try to abstract the addToast function as it seems somewhat generic. What do you think?