Configuring the orientation of the tabs in a vertical group header

[maddouri]

Is your feature request related to a problem? Please describe.

I would like to please be able to configure how the tabs are oriented in a vertical group header.

For example, for a group header that is placed to the "left", I would like to choose to orient the tabs to be in either one of the following configurations:

A. The only available configuration at the moment:

B. Alternative configuration with vertical text:

C. Alternative configuration with horizontal text:

Describe the solution you'd like

A way to configure the orientation of the tabs in a vertical tab group.

Describe alternatives you've considered

I'm not currently aware of alternatives.

Additional context

Example of FlexLayout's default behavior/tab configuration:

Example of Jetbrains CLion IDE with horizontal text in a vertical tab bar group:

Congratulations on merging #1103 and thank you in advance for considering this request 🙂