Bug Description:

In macOS, tabbed window interfaces have the close button for a tab on the left side of the tab. Theia has them on the right hand side.

Steps to Reproduce:

1. Launch Theia IDE.
2. Open a file in an editor.
3. See the close button for the tab appear on the right-hand side of the tab title when hovering the pointer over it.

Additional Information

• Operating System: macOS Sequoia 15.3 on M4 Max
• Theia Version: 1.58.100.202

This:

should be like this: