Navbar update for header links: "Add New" and "Manage"

[DaveTrost]

Purpose
Clicking on "Add New" or "Manage" in the navigation bar has awkward behavior.

Proposed Solution
Not sure what the best user experience is for the Navigation Pane. Solution 1 is to make the "Add New" and "Manage" text items unclickable. In this case, the mouse indicator should not change and the text color of the heading should not change either. Solution 2 is to leave the "Add New" and "Manage" items as clickable and send the user to either the "Add Tenant" page or the "Manage Tenants" page, respectively. You may have other solutions to try. This one is open to intepretation!

Please make sure you've attempted to meet the following coding standards

• Code builds successfully
• Code has been tested and does not produce errors
• Code is readable and formatted
• There isn't any unnecessary commented-out code
• There aren't any unnecessary commits or files changed (shouldn't touch the /stashed folder unless the issue requests it)

Mockup Screenshot or Page Number
Page 8 of the FIGMA designs