WIP: Show pending contacts in contact list

...lin/org/briarproject/briar/desktop/contact/ContactCard.kt

...g/briarproject/briar/desktop/contact/ContactInfoDrawer.kt

...lin/org/briarproject/briar/desktop/contact/ContactItem.kt

...lin/org/briarproject/briar/desktop/contact/ContactList.kt

...riarproject/briar/desktop/contact/ContactListViewModel.kt

...g/briarproject/briar/desktop/contact/ContactsViewModel.kt

...rg/briarproject/briar/desktop/contact/DesktopContactId.kt

...rproject/briar/desktop/contact/DesktopPendingContactId.kt

...riarproject/briar/desktop/contact/DesktopRealContactId.kt

.../briarproject/briar/desktop/contact/PendingContactItem.kt

...org/briarproject/briar/desktop/contact/RealContactItem.kt

...rproject/briar/desktop/conversation/ConversationHeader.kt

...oject/briar/desktop/conversation/ConversationViewModel.kt

...roject/briar/desktop/conversation/PrivateMessageScreen.kt

...ject/briar/desktop/introduction/ContactDrawerMakeIntro.kt

...oject/briar/desktop/introduction/IntroductionViewModel.kt