I installed the
libreoffice-qt5 packages, and it does not use the KDE themes.
I am using Kubuntu 18.04 and LibreOffice 6.2.4 from the
LibreOffice Fresh PPA.
I know that I can use the GTK theme, and that looks better than this KDE theme, but is there any way to make the LibreOffice with a KDE theme match the theme of my system?