Tab order is not restored for the Project Group

### Apache NetBeans version

Apache NetBeans 20

### What happened

I have several Project Groups. When I switch between project groups, previously opened tabs do conveniently reopen. However the order of tabs is not restored which is not convenient. I even suggest that the order of tabs may be reversed when the Project Group is reopened.

### Language / Project Type / NetBeans Component

Two project groups each being Java Maven Project with modules

### How to reproduce

Create two Project groups each being Java Maven Project. Open some files in the first project group. Reorder some tabs. Switch to the second project group, open some files and reorder some tabs. Switch between project groups. See if the tab order is restored.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Windows 10

### JDK

20 OpenJDK

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

Every time for my specific project groups.

### Are you willing to submit a pull request?

No

No source file, test, or entry point is named. Reproduce the issue with two Java Maven project groups, reordered tabs, and switches between groups; done means each group's tab order is restored when reopened.

Written by the indexing model from the issue text.