Comment 16 for bug 1509562

After looking into the implementation of libqt5libqgtk2, I have additionally installed kde-config-gtk-style and made the following settings to get the search and replace icons displayed in Kate. Also the save dialog looks good, but I did not check it before this change.

* Xfce Settings >> Appearance >> Icons -> "elementary Xfce darker"
(That's what I want to have, wherever possible.)

* Xfce Settings >> KDE System Settings >> Icons >> Icons >> Theme -> "Oxygen"
(It seems that e.g. Konqueror still uses this setting. If an icon is missing, it seems to fall back to "Breeze" (hard-coded?). Setting this option to some "elementary Xfce" theme results in a mix of elementary and Breeze icons when Konqueror is used as file manager. For instance, the view mode icons in the toolbar are Breeze-like. This looks surprising. Therefore I prefer to see Konqueror fully in Oxygen. I wonder whether this setting becomes irrelevant for Konqueror, once that application is also migrated to Qt5's QIcon::fromTheme(...).)

* Xfce Settings >> KDE System Settings >> Application Style >> GNOME Application Style (GTK)
- Icon theme -> "elementary Xfce darker"
- Fallback theme -> "Oxygen"
(This fallback seems to be used by Kate for the search and replace icons. I wonder if they are possibly missing in the "elementary Xfce" theme.)

So far this gives the best appearance since I upgraded from Xubuntu 15.04 to 15.10.