Add an option to disable spell proc highlight flashes on the action bars.

I've been doing this in my own addons, it's pretty simple actually to just hide the glow.

local function DenyOverlayGlow(actionButton)
	if somesettingprofile.hide_glow then
		actionButton.overlay:Hide()
	end
end

hooksecurefunc('ActionButton_ShowOverlayGlow', DenyOverlayGlow) -- Disable Blizzard's built-in action button glowing

Disabling per spell would be optimal.

You could check the actionButton icon against a list of spells (that you want to disable glow for) icons within that function in order to do that easily.

I think this would be a good candidate for a separate addon, since it could work on things other than just Dominos.

I don't really have the ability to control this one at the moment. Maybe if I opt to roll my own action button code.