Created attachment 120640 [details]
Windows List Widget Opened along with its config dialog on KDE 4

SUMMARY
The Window List Widget doesn't put windows under their activity heading first and then there desktop as it once did. Windows are only under a desktop heading regardless of activity. This means that windows on the same desktop # but under different activities end up under the same heading even though they are in separate activities

STEPS TO REPRODUCE
1. Install the Windows List Widget on a panel
2. Create multiple activities
3. Create multiple desktops
4. Open app windows in multiple desktops in multiple activities.
5. Select the Windows List widget

OBSERVED RESULT
Open windows are only listed under their desktop, not their activity

EXPECTED RESULT
There should be a top level heading of "Activity", below which there should be a list of windows tagged with their desktop. For windows accross multiple activities and or desktops, these are displayed at the top without a heading but tagged with their activities and desktops.


SOFTWARE/OS VERSIONS
Linux: 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u2 (2019-05-13) x86_64 GNU/Linux
Debian Running Under VMware® Workstation 12 Pro: 12.5.9 build-7535481
Single Moniter (no alternative)
KDE Plasma Version: Version 5.8.4
KDE Frameworks 5.28.0
Qt 5.7.1 (built against 5.7.1)
The xcb windowing system

ADDITIONAL INFORMATION