Virtually "merge" multiple Mattermost teams into one view

I am a member of multiple teams. Many people from our organizations are members of all the teams, but some of them only of some. I never remember in which team they are and navigating through the UI is very cumbersome.

Is it possible to “merge” the teams into one single view, where I would see only one submenu Favorites, only one submenu Channels and only one submenu Direct Messages?

I don’t mean to merge the teams, just to visually merge each of the previous categories in the UI. I absolutely don’t care about the teams, it’s mostly disturbing, because our team membership is based rather on the company branches and external companies, and I don’t know (and don’t care) in which part of the company structure each person is. And many people (but not all) are members of all the teams.