Don't disallow mouse events when in compact mode for plots (#7975)

* Allow highlights and locking highlight points for plots in compact mode, but still disallow pan and zoom.

* Remove unnecessary watch on cursor guides and grid lines

* Test for cursor guides in compact mode

e2e/tests/functional/plugins/plot/plotControlsCompactMode.e2e.spec.js

@@ -0,0 +1,58 @@
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+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
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+
+/*
+ * This test suite is dedicated to testing the rendering and interaction of plots.
+ *
+ */
+
+import { createDomainObjectWithDefaults } from '../../../../appActions.js';
+import { expect, test } from '../../../../pluginFixtures.js';
+
+test.describe('Plot Controls in compact mode', () => {
+  let timeStrip;
+
+  test.beforeEach(async ({ page }) => {
+    // Open a browser, navigate to the main page, and wait until all networkevents to resolve
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+    timeStrip = await createDomainObjectWithDefaults(page, {
+      type: 'Time Strip'
+    });
+
+    // Create an overlay plot with a sine wave generator
+    await createDomainObjectWithDefaults(page, {
+      type: 'Sine Wave Generator',
+      parent: timeStrip.uuid
+    });
+    await page.goto(`${timeStrip.url}`);
+  });
+
+  test('Plots show cursor guides', async ({ page }) => {
+    // hover over plot for plot controls
+    await page.getByLabel('Plot Canvas').hover();
+    // click on cursor guides control
+    await page.getByTitle('Toggle cursor guides').click();
+    await page.getByLabel('Plot Canvas').hover();
+    await expect(page.getByLabel('Vertical cursor guide')).toBeVisible();
+    await expect(page.getByLabel('Horizontal cursor guide')).toBeVisible();
+  });
+});