Grouped window list: Add option to only list windows from the current monitor

[jarierca]

Hi :)

I added an old feature to show only active applications on the current monitor which was deleted in commit (ef4610c)
Now allows to toggle between showing only current monitor applications or showing all apps from all monitors. This PR is related to this topic #8802

[JosephMcc]

Imho, this functionality should never have been removed. It's one of the most useful features when using multiple monitors.

[clefebvre]

How do you use it though?

As it is, it already does only show you your monitor apps if you have an applet on the other monitor.

[jarierca]

Hello, I'm sorry for explaining so briefly.
As it is now, if you have 1 panel and for example 3 monitors, all applications are displayed in the single panel.

However, if you want to have 3 panels (1 per monitor), applications from all monitors are not displayed.

That's why I added the button "Only list windows in the current monitor" (when you have more than 1 panel) (defaulting to true, which would have the same effect as it currently is before this change).

If I set this button to false, for example on the central monitor it would look like this (if I tried to do the same as it is now, I wouldn't see all the apps open on the central monitor).

And if I mark it as false in the configuration for all panels, it would look like this:

If you need more help or information, let me know. ;)