Change default config for the Main Navigation menu with Number of levels to display to three levels and Expand all menu links

Problem/Motivation

Number of levels to display is limited the main navigation menu block and not expanded.
#3456935: Fix dropdown menu limited to only two levels
#3469222: Fix Popper.js Error When Adding Navbar Dropdown in Vartheme BS5
#3471477: Fix Popper.js Error When Adding Navbar Dropdown in Varbase Components

Proposed resolution

• Change Number of levels to display three levels.
• Change to Expand all menu links

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-10.0.2, vartheme_bs5-3.0.3

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

Config of the main navigation block in the default theme

Font-end main navigation

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3471479: Changed default config for the Main Navigation menu with Number of levels to display to three levels and Expand all menu links