Created attachment 116984 [details]
The widget cross over the top-border, it's obviously in the attachment. A screenshot(in attachment) is enough to describe it.
STEPS TO REPRODUCE
1. launch the "system settings", select "Regional Settings",
2. Select "Language" in the left tree view, then click the button "Add Languages"
3. Drag the scroll bar down, then you'll got that bug.
The widget cross over the top-border
OS : KDE NEON 5.14 user edition.
Whoops! Can confirm.
Operating System: Arch Linux
KDE Plasma Version: 5.15.2
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.1
Git commit 1da28ae4e63c67d42d7098cac60d9c088837ff60 by Marco Martin.
Committed on 05/03/2019 at 17:04.
Pushed by mart into branch 'master'.
in some scenarios contents can bleed out
M +2 -1 src/controls/templates/OverlaySheet.qml