Fix missing visualization preview in CB (#5757)

Closes #5639

This PR fixes a regression introduced in #4120, due to which new nodes that were being edited had an empty visualization preview. Now newly created visualization containers do get a default visualization set even before the visualization's input type is set.

https://user-images.githubusercontent.com/117099775/221256294-c87a50da-c8b0-4f00-bf84-f5ae551fca72.mp4

CHANGELOG.md

@@ -103,6 +103,7 @@
 - [The component browser suggestions take into account entry aliases][5678]. The
   searcher input is now matched to entry aliases too. The alias match is used to
   filter and sort component browser entries.
+- [Fixed missing result preview when editing nodes.][5757]
 
 #### EnsoGL (rendering engine)
 
@@ -500,6 +501,7 @@
 [5699]: https://github.com/enso-org/enso/pull/5699
 [5719]: https://github.com/enso-org/enso/pull/5719
 [5721]: https://github.com/enso-org/enso/pull/5721
+[5757]: https://github.com/enso-org/enso/pull/5757
 
 #### Enso Compiler
 

app/gui/view/graph-editor/src/component/visualization/container.rs

@@ -501,10 +501,14 @@ impl Container {
             eval_ frp.toggle_visibility (model.toggle_visibility());
 
             visualisation_uninitialised <- frp.set_visualization.map(|t| t.is_none());
-            set_default_visualisation <- frp.set_vis_input_type.gate(&visualisation_uninitialised).unwrap();
-            default_visualisation <- set_default_visualisation.map(f!((tp) {
+            default_visualisation <- visualisation_uninitialised.on_true().map(|_| {
+                Some(visualization::Registry::default_visualisation())
+            });
+            vis_input_type <- frp.set_vis_input_type.gate(&visualisation_uninitialised).unwrap();
+            default_visualisation_for_type <- vis_input_type.map(f!((tp) {
                registry.default_visualization_for_type(tp)
             }));
+            default_visualisation <- any(&default_visualisation, &default_visualisation_for_type);
 
             eval  frp.set_data          ((t) model.set_visualization_data(t));
             frp.source.size    <+ frp.set_size;