Some of our search pages (such as the room and user search) has a list
header item. Due to how this works, it's not actually a part of the
list view keyboard navigation and a whole separate item. So in the tab
order, it comes *after* the list view which makes no sense. And it's
part of the list view, so users must expect it to be selectable with the
up and down arrows like other items.
This simple change makes it so it behaves as expected. The first actual
list item is selected by default, but it's possible to navigate to the
list header item via the up arrow key and then return to the list view
using the down arrow. The list header item is also removed from the tab
order and the whole page is much nicer to use now.
Add the ability to search in the user directory for friends.
This adds an option in roomlist when on the friends tab and opens a search dialog when clicked. The new search model searches the user directory for the given filter term.
Pull the generic aspects from Room search and join room pages into it's own component. This is done in anticipation of using the new generic search page for a user search functionality.
- `SearchPage` is now used for the generic version with the old one being renamed `RoomSearchPage`
- `JoinRoomPage` is renamed to `ExploreRoomsPage` inline with everywhere else in NeoChat
There is also some cleanup of the code for both search pages in here.
