Theia windows in tabs (mac)

[marjo8]

When I have multiple projects open in vscode, they show up in tabs. Each windows becomes a tab.
I have set my mac to always use tabs for multiple windows. So, I see tabs for all windows in applications running on my mac (if the application does have multiple windows open).

In Theia-IDE, the tabs do not show up, regardless of this setting on my mac.

It would be very helpful to me, if Theia-IDE would behave in the expected way: showing a tab for each open window.

[tsmaeder]

Sorry, I'm not a Mac user. Could you maybe provide a video or a more detailed description?

[marjo8]

Here are some screen shots.

First: this is controlled by a Mac setting. The first screen shot shows the Mac settings panel for Desktop & Dock. There is a green thingy around the setting that controles the tabs.

The next screen shot shows the vscode icon when right clicked on it. You will see three projects open.

The next one is the vscode screen with the three projects open. There is a green thingy around the tabs (those tabs are created by the Mac OS. If the setting shown earlier is changed they will not show)

The next screenshot shows vscode window settings that control this behaviour (I think). A green thing around the setting that seems to control this. Despite the text in the setting, I run the newer MacOS Sequoia, where this also works.

Then we get to Theia. For starters, Theia starts new windows that are not the same size as the original one. So I have to resize and things to get them right.
The same projects as in vscode are open, as shown by the Theia icon right clicked in this screenshot.

The Theia windows do not show tabs, they are in different positions and such. In vscode each new project opened, gets a new window tab, with the same size as the already open ones. Just another tab is added and that new tab contains the window.
Here is the screenshot for that

This tab feature is a MacOS feature. It works in all multiwindow applications I use on my Mac. Every new window shows in a tab (except if only one window is open in an application. Then just that one window is shown)

What I would really, really like, is that Theia uses the tab feature of MacOS, and that if opening a new project in a separate tab, the window has the same size as the already open ones.

Does that describe well enough what the issue is, or is there more that I can add?