Comment # 2 on bug 985937 from Wolfgang Bauer

@Billy Brawner:
As I already wrote on the mailinglist too, the default application menu icon is
taken from the Plasma theme in Plasma5, unlike KDE4.

If you want to adjust the openSUSE theme(s), see here for how Plasma's theming
works:
https://techbase.kde.org/Development/Tutorials/Plasma5/ThemeDetails

Though this is also not completely up-to-date for current Plasma versions.
The main changes I know of:
- the application menu icon is taken from start.svgz
- the logout/restart/reboot and so on icons are taken from system.svgz now, not
exactly necessary to add that though (if it is missing from the theme, the ones
from the default theme, breeze, are used)

So in this particular case, mainly the start.svgz needs to be added I suppose,
we do have a scalable icon in
/usr/share/icons/oxygen/scalable/places/start-here-branding.svgz (part of
plasma5-workspace-branding-openSUSE).
Probably just copying that to /usr/share/plasma/desktoptheme/XXX/ would be
sufficient, but I haven't tried that yet.

Though other things might have to be updated too to have a proper openSUSE
theme again.

The github repo you mentioned is where the KDE4 branding was maintained (we
merely "inherited" that from the past when SUSE themselves still maintained
KDE4 AFAIK), we didn't use it for Plasma5 at all.
Though maybe we should sync it again? What do the other team members think
about that?

The current branding can only be found in the OBS development project:
https://build.opensuse.org/package/show/KDE:Frameworks5/plasma5-openSUSE

So if you want to change something, please branch from there and submit back.

Feel free to ask if you have further questions.

Regarding the wallpaper: we only take the default openSUSE one, so that's not a
KDE issue but would need to be changed in general.