brought back App.css mui custom classes for drawer indexes

src/app/App.css

@@ -25,7 +25,7 @@ html, body, #root {
 }
 
 /* styles.css or a CSS module */
-/* .MuiDialog-root {
+.MuiDialog-root {
   z-index: 1500 !important;
 }
 
@@ -35,4 +35,4 @@ html, body, #root {
 
 .MuiMenu-root { 
   z-index: 1400 !important; 
-} */
+}

src/theme/theme.ts

@@ -56,7 +56,7 @@ export const getTheme = (mode: 'light' | 'dark') =>
           background: {
             default: "#e9e9e9",
             paper: "#fafafa",
-          }
+          },
         }),
     },
   });