Add avatar beside user name in the top bar header

[Info 3bits]

Add the avatar beside the username in the header and the Dashboard as well (similar to Clean)

Could we add a setting to show the avatar rounded or squared. Maybe another to display the avatar, or not, in the header.

[Alexander Goryntsev]

Linked to #208

[robertochis]

Hola Alexander; ya tienes la respuesta de como agregar un avatar a lado del nombre del usuario.

[Info 3bits]

Dashboard and profile page created in #528

[Info 3bits]

Fix #488

→ <<cset 356390477257>>

[Info 3bits]

Issue #577 was marked as a duplicate of this issue.