Click on window buttons in task bar to cycle through windows

Nobody has claimed this yet.

### Expected

A really nice feature of [7+ Taskbar Tweaker](https://ramensoftware.com/7-taskbar-tweaker) that I was using on Windows 10, was the option to cycle through the windows grouped/combined under the tasbar item (window button in XFCE) just by left-clicking on the item itself.

### Actual

Currently when left-clicking on a window button with the `Group windows by application` panel preference enabled, it just brings up the list of open windows and you have to select something in the list before it brings the window to focous.


### Solution

TBD

There are some cycling options in **Window Manager Tweaks** -> **Cycling** but none of them address my use case and are pretty much focused on the `Alt + Tab` functionality.

And looking at the Window Buttons preferences by **Right-clicking** on the task bar -> **Panel** -> **Panel Preferences** -> **Items** -> Select the **Window Buttons** -> Click the 4-line hamburger menu icon at the bottom to edit the item; we don't see anything that would address this: ([Window Buttons preferences screenshot](https://user-images.githubusercontent.com/558581/236956193-ec7838bc-7539-403f-8d51-68725dfc23c9.png))

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System Details:

- Manjaro 22.1.2 with XFCE
- Chrome Version 113.0.5672.126

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Keywords:

- switch windows by left-clicking on window button

Start by examining XFCE's Window Buttons behavior when Group windows by application is enabled, then compare it with the existing Cycling options in Window Manager Tweaks. The issue does not name source files or tests; done would require a defined interaction and implementation that cycles grouped windows on left-click without requiring list selection.

Written by the indexing model from the issue text.