editor repaints any errors when rendered (#3260)

* editor repaints any errors when rendered

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* Update src/lang/KclSingleton.ts

* fix test

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* fix typo

---------

Signed-off-by: Jess Frazelle <github@jessfraz.com>
Co-authored-by: Kurt Hutten <k.hutten@protonmail.ch>

src/components/ModelingSidebar/ModelingPanes/KclEditorPane.tsx

@@ -193,6 +193,10 @@ export const KclEditorPane = () => {
           if (_editorView === null) return
 
           editorManager.setEditorView(_editorView)
+
+          // On first load of this component, ensure we show the current errors
+          // in the editor.
+          kclManager.setDiagnosticsForCurrentErrors()
         }}
       />
     </div>