Invited-pending users

[sebgie]

When inviting a new user there is a chance that the invite email is not sent. In this case the API returns an error message and the user is added to the database. The user is then shown as invited user (see #3229). To make it clear to the inviter which emails have been sent a new user status (status: 'invited-pending') was introduced in PR #3260 . Users with the status invited-pending should be highlighted in the invited users list to show that the invitation emails need resending.

@JohnONolan: We would need some design guidance on how the highlighting should look like.

[morficus]

once we have an answer, we could role this in to #3222

[sebgie]

Refs: #3309

[JohnONolan]

Sorry - totally missed this issue. Either this or #3309 can be closed as duplicate

[ErisDS]

Gonna close this one, because the shiny what-it-should-look like stuff is on #3309