The workspace plugin in Compass doesn't distinguish between the specifics of the workspace (with the exception of namespace). That means that when a new Data Modeling tab is opened, the workspace plugin doesn't know if it's the list view or a single diagram (and which one).

This lead to the https://jira.mongodb.org/browse/COMPASS-10032 bug, as well as some inconvenience when opening new Data Modeling tabs.

For namespace tabs, if I have made some changes, the next namespace/database will open in a new tab. Otherwise, it opens in the same tab. If I try to re-open a namespace, it'll just switch to the existing tab.

We could have a similar behaviour for the Data Modeling:

• for the same context, we switch to the existing tab (e.g. I'm reopening a diagram that I already have open)
• for a different context (e.g. I have a diagram opened but I click on 'Data Modeling'), we open a new tab