Since we are using the react-i18n babel loader plugin, useI18n can only
be used once per file. Also we have to remember to add the istanbul
ignore next comment each time we use it. By moving this to a common
file, it can be easily copied and pasted when a new submodule is
created and we don't have to remember the rules when calling it.
This makes the code a bit shorter by not having to use `props.` all of
the time. Also make everything VoidFunctionComponent while we are
touching this.
55e724e8d8 introduced <p> elements on
notifications. however this is undesirable on the notification action
text. This splits the Notification component into one that is pre change
and one that is post change.
Fixes #394
David Lechner