I'm talking of the detachable tray popup window (see screenshot). There are ways to increase it's size, but there is no way to shrink it.
Steps to Reproduce:
1. Open the extended system tray
2. detach the window
3. Move the window (by pressing Alt + drag&drop) to a screen corner
The tray popup window gets maximized or big as half of the screen, depending to what screen edge you used
There is no way to skrink the window. My tray popup now always looks like in the screenshot, it doesn't go back to normal.
Created attachment 90981 [details]
I can confirm this bug
Just open the tray, pin it, and use Alt+F3 to invoke kwin window menu and resize the popup (at point 3 the tray popup is resized by window snapping).
By the way, the pin icon on the top of the tray popup is *not* to detach but rather to pin it so it does not disappear, and is visible on all desktops.
The fact that in this configuration it can be resized and moved around as any other window is more of a collateral effect I'd assume, since this feature is nowhere advertised: there are no controls on the popup window.
This is not a bug really, unless one decides that there should be no way to resize the popup.
This is a duplicate of bug 365217.
According to the date it's the other way around.
(In reply to naraesk from comment #5)
> According to the date it's the other way around.
Ooops. Right, my bad! Looked at the modified date.. Probably someone with sufficient rights can close the other bug (although there is a scrolling issue being discussed as well there)
*** This bug has been marked as a duplicate of bug 332512 ***