The plain style for quote block was not showing in the editor despite showing on the front. This patch now makes sure it also does not show the border in editor.
Reviewed by audrasjb, karmatosed.
Merges [60342] to the 6.8 branch.
Props nidhidhandhukiya, dilipbheda, sabernhardt, sainathpoojary, dhruvang21, harshgajipara, SirLouen, darshitrajyaguru97, jorbin.
Fixes#63424.
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