from newest sample in guides/theming.md
from newest sample in guides/theming.md

Signed-off-by: m67hoff <1750f661eeacaa73456591f6cb74ccb59e707bb5@web.de>

kmui2/Giphy-Flashcards-with-Angular-Materials,kmui2/Giphy-Flashcards-with-Angular-Materials,kmui2/Giphy-Flashcards-with-Angular-Materials