Issue #3212120 by kiran.kadam911, kostyashupenko, tushar_sachdeva,...

Issue #3212120 by kiran.kadam911, kostyashupenko, tushar_sachdeva, chetanbharambe, ranjith_kumar_k_u, mherchel, aaron.ferris: Blockquote's content font size should be decreased when it is placed into the sidebar in the Olivero theme

(cherry picked from commit 75394d6d)