Hello, I'm upgrading to plasma 5.8, but I see in other computer plasma 5.8 upgrades breeze theme. I like to keep my current breeze theme settings. How do I do that?

Edit: fortunately not so difficult. Just do :
1. create backup of /usr/share/plasma/
2. perform upgrade
3. rename upgraded /usr/share/plasma/ to /usr/share/plasma.NEW/
4. restore backup of /usr/share/plasma/
5. do minor adjustments in some *.qml files (I forgot their names)

Now my favorite login theme, login splash, lockscreen restored