Toasts > Implement hover functionality

The following discussion from !235 (merged) should be addressed:

In our design documentation we state that all toasts should fade out after a certain period of time and that:

Hovering over a disappearing toast will cause it to remain until the cursor is moved.

Not dismissing the toast on hover is not currently supported by vue-toasted. To implement the hovering shouldn't be too difficult, however, we may need to contribute to their project to make it work.