gtk3-metatheme-elementary from X11:Pantheon project

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For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:Pantheon/openSUSE_Tumbleweed/X11:Pantheon.repo
zypper refresh
zypper install gtk3-metatheme-elementary

Packages for openSUSE Tumbleweed: