Add More E2E Tests for post-menu Component

[alionazherdetska]

Description:
Enhance the end-to-end test coverage for the post-menu component by adding the following test cases:

Test Cases to Implement:

1. Toggle Visibility Test:

   • Verify that @menu is visible after toggling.

2. Multiple Triggers and Menus - Independent Toggling:

   • Add two triggers (toggleA and toggleB) and two menus (menuA and menuB).
   • Connect toggleA to menuA and toggleB to menuB.
   • Verify that:
     • Clicking toggleA toggles only menuA.
     • Clicking toggleB toggles only menuB.

3. Multiple Triggers for One Menu:

   • Add two triggers (toggleA and toggleB) and two menus (menuA and menuB).
   • Connect both toggleA and toggleB to menuA, leaving menuB unconnected.
   • Verify that:
     • Clicking toggleA toggles menuA.
     • Clicking toggleB also toggles menuA.
     • menuB is not affected by either trigger.