Refactor thumbnails presentation: while loading they have a fixed size and a background (anonymous) image
(cherry picked from commit fcc8ec3)
Rephrased button label
(cherry picked from commit bc54e52)
Always update signUpTime when status changes
(cherry picked from commit 301e101)
Fixed typo in Down section
(cherry picked from commit c6125e4)
Refactor: Generating (instead of storing) the User's image URLs on the fly for better flexibility
(cherry picked from commit 5d03667)