fix: don't show canvasBackground label when UIOptions.canvasActions.changeViewBackgroundColor is false (#6781)

* fix(components/main-menu): not show canvasBackground

* chore(components/main-menu): add data-testid attr to canvasBackground label

* test(tests/packages/excalidraw): check whether canvasbackground label is rendered when changeviewbackground is false

* test: update snapshots

* fix(tests/packages/excalidraw): change to lowercase canvas background test id

* change to pull request target for size-limit

* Revert "change to pull request target for size-limit"

This reverts commit baf1ca2677.

* Add test

---------

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

src/packages/excalidraw/example/App.tsx

@@ -678,7 +678,11 @@ export default function App({ appTitle, useCustom, customArgs }: AppProps) {
             gridModeEnabled={gridModeEnabled}
             theme={theme}
             name="Custom name of drawing"
-            UIOptions={{ canvasActions: { loadScene: false } }}
+            UIOptions={{
+              canvasActions: {
+                loadScene: false,
+              },
+            }}
             renderTopRightUI={renderTopRightUI}
             onLinkOpen={onLinkOpen}
             onPointerDown={onPointerDown}