New expert option: cycle all windows from all workspaces

Mentioned on the WMaker user mailing list, option disabled by default.

https://groups.google.com/g/wmaker-user/c/pR8P-ZYCDFo/m/Wo42U_xqBgAJ

So basically the patch is adding a new expert option in WPrefs (disabled by
default) to allow the switch panel to cycle over all the windows from all
workspaces. I believe it's useful if you are using a lot of fullscreen apps
each on different workspaces.

WindowMaker/Defaults/WindowMaker.in

@@ -252,5 +252,6 @@
 	SelectCursor = (builtin, cross);
 	DialogHistoryLines = 500;
 	CycleActiveHeadOnly = NO;
+	CycleAllWorkspaces = NO;
 	CycleIgnoreMinimized = NO;
 }