Integration of openDesk-Toolbar

[rvveber]

Feature Request

openDesk wants to have a universal Header to access any openDesk applications and Account settings from.

Currently all applications integrated in openDesk need to implement it individually.

It should look like this:

The specification of what functionality needs to be implemented is currently beeing discussed and this issue will be updated later.

Anything that could benefit other users and contribute to the general whitelabeling of Docs, should go into the main branch.
All customization in regards to openDesk should go in the main-opendesk branch for now.
Maybe a Fork with openDesk customizations would make sense in the future.

[virgile-dev]

@rvveber For me it doesn't really fit in the generic product and could even be a customization layer that admins have to make on their deployment repo.
A middle ground would be make this so that's something that is configured by the admin sys who deploy the product.
@AntoLC What are your thoughts on this ?