FEAT: [VID] smarter merging of actors in a style with custom actors i…

…n the instance.

Use-case example:

    view [
        style but: base
            on-down [face/color: face/color / 2 do-actor face event 'click]
            on-up   [face/color: face/color * 2]

        but red on-click [print "hi"]
    ]

modules/view/VID.red

@@ -432,6 +432,11 @@ system/view/VID: context [
 				if none? face-font/:field [face-font/:field: get value]
 			]
 		]
+		if all [block? face/actors block? actors: opts/actors][
+			foreach [name f s b] face/actors [
+				unless find actors name [repend actors [name f s b]]
+			]
+		]
 
 		set/some face opts								;-- merge default+styles and user options