fix: scope --color-selection retrieval to given instance (#6886)

Co-authored-by: dwelle <luzar.david@gmail.com>

src/components/App.tsx

@@ -1226,6 +1226,7 @@ class App extends React.Component<AppProps, AppState> {
                           }}
                         />
                         <InteractiveCanvas
+                          containerRef={this.excalidrawContainerRef}
                           canvas={this.interactiveCanvas}
                           elements={canvasElements}
                           visibleElements={visibleElements}