Added the ability to batch process the color of cards and arrow lines in the canvas

After I input a large number of cards, I need to change the cards to the same color one by one, and the same is true for connecting the lines between the cards. If I add batch color changes, I will save more repetitive work .Even if you batch select cards into groups, you cannot change the color of the cards and wires within the group

What I’m trying to do

Things I have tried

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