feat: optimize description and variable naming

Signed-off-by: SuZhou-Joe <suzhou@amazon.com>

src/core/public/chrome/ui/header/collapsible_nav_group_enabled_top.tsx

@@ -43,7 +43,7 @@ export const CollapsibleNavTop = ({
 }: CollapsibleNavTopProps) => {
   const homeLink = useMemo(() => navLinks.find((link) => link.id === 'home'), [navLinks]);
 
-  const isInGlobalWorkspace = useMemo(
+  const isOutsideWorkspace = useMemo(
     () => !visibleUseCases.find((useCase) => useCase.id === currentNavGroup?.id),
     [currentNavGroup, visibleUseCases]
   );
@@ -58,12 +58,12 @@ export const CollapsibleNavTop = ({
       return false;
     }
 
-    if (isInGlobalWorkspace) {
+    if (isOutsideWorkspace) {
       return true;
     }
 
     return visibleUseCases.length > 1;
-  }, [visibleUseCases, currentNavGroup, shouldShrinkNavigation, isInGlobalWorkspace]);
+  }, [visibleUseCases, currentNavGroup, shouldShrinkNavigation, isOutsideWorkspace]);
 
   const shouldShowHomeLink = useMemo(() => {
     if (!homeLink || shouldShrinkNavigation) return false;

src/plugins/dev_tools/public/dev_tools_icon.test.tsx

@@ -10,7 +10,7 @@ import { coreMock } from '../../../core/public/mocks';
 import { DEFAULT_NAV_GROUPS } from '../../../core/public';
 
 describe('<DevToolsIcon />', () => {
-  it('should call some methods from core service when click', () => {
+  it('should call chrome.navGroup.setCurrentNavGroup and application.navigateToApp methods from core service when click', () => {
     const coreStartMock = coreMock.createStart();
     const { container } = render(<DevToolsIcon core={coreStartMock} appId="foo" />);
     const component = container.children[0];