Preload main 4 containers

Re-add sections preload but only for Unread, All Posts, Bookmarks and Drafts.

To test:

go to Unread
do you see the post appear w/o any special delay?
do you see AP, Bookmarks and Drafts being loaded with a small delay (5 seconds plus 1 seconds btw each other)
go to AP
do you see the post appear w/o any special delay?
do you see Unread, Bookmarks and Drafts being loaded with a small delay (5 seconds plus 1 seconds btw each other)
go to Bookmarks
do you see the post appear w/o any special delay?
do you see Unread, All Posts and Drafts being loaded with a small delay (5 seconds plus 1 seconds btw each other)
go to Drafts
do you see the post appear w/o any special delay?
do you see Unread, All Posts and Drafts being loaded with a small delay (5 seconds plus 1 seconds btw each other)
do you NOT see those sections being preloaded again when you do internal nav?

open-company / open-company-web