Implement user picture edit via user list view.

Move picture edit to user detail controller and
reuse it on profile page.
Also add default avatar picture.

SDUX-34
Refactor user edit on user profile/detail.

Add a notification service to display notifications.
Add sd-user-edit directive for editing used from both profile and list.

SDUX-34
Fix user picture saving on upload save.

SDUX-34