fix redisplaying figures on same screen

GLMakie/src/display.jl

@@ -2,6 +2,10 @@ function Base.display(screen::Screen, scene::Scene; connect=true)
     # So, the GLFW window events are not guarantee to fire
     # when we close a window, so we ensure this here!
     if !Makie.is_displayed(screen, scene)
+        if !isnothing(screen.root_scene)
+            delete!(screen, screen.root_scene)
+            screen.root_scene = nothing
+        end
         display_scene!(screen, scene)
     else
         @assert screen.root_scene === scene "internal error. Scene already displayed by screen but not as root scene"