Posibility to show widgets after click to QSystemTrayIcon

Will be nice to have some uniform way to show widget after left click on QSystemTrayIcon. A lot of qt application does it at different ways (example: nextcloud https://github.com/nextcloud/desktop/blob/master/src/gui/systray.cpp). It requires from application to calculate: which screen should be coshed and where should be position of widget.

If it will be uniformed way than for example KDE Plasma will have possibility to move this window inside their standardized docks

Nextcloud example: