Make main menu full width on mobile again.

src/components/dropdownMenu/DropdownMenu.scss

@@ -3,6 +3,11 @@
 .excalidraw {
   [data-radix-popper-content-wrapper] {
     z-index: 1 !important;
+
+    @include isMobile {
+      width: 100%;
+      max-width: var(--radix-popper-available-width);
+    }
   }
 
   .dropdown-menu {
@@ -30,15 +35,6 @@
 
     &--mobile {
       max-width: none;
-      // bottom: 55px;
-      // top: auto;
-      // left: 0;
-      // // TODO barnabasmolnar/mainmenu-radix
-      // // double check rendering/styling on mobile
-      // // width: 100%;
-      // display: flex;
-      // flex-direction: column;
-      // row-gap: 0.75rem;
 
       .dropdown-menu-container {
         padding: 8px 8px;