Correct title of Theme Toggle toolbar button (#578)

* Update ThemeToggle title attribute to accurately reflect the purpose of the button

* Fix title attribute for ThemeToggle component

* Fix lint 10:50 error String must use doublequote

* www#lint 10:23 error requires attributes on a distinct lines

* linter is very picky about spacing

Author: smartcaveman

apps/www/src/features/editor/Toolbar/ThemeToggle.tsx

@@ -7,7 +7,10 @@ export const ThemeToggle = () => {
   const toggleDarkMode = useConfig(state => state.toggleDarkMode);
 
   return (
-    <StyledToolElement title="Fullscreen" onClick={() => toggleDarkMode(!darkmodeEnabled)}>
+    <StyledToolElement
+      title={!darkmodeEnabled ? "Dark Mode" : "Light Mode"}
+      onClick={() => toggleDarkMode(!darkmodeEnabled)}
+    >
       {!darkmodeEnabled ? <FaMoon size="18" /> : <FaSun size="18" />}
     </StyledToolElement>
   );