VPN-6215 : Fix navbar visibility after viewing reset options

[lesleyjanenorton]

Description

This PR removes property bool wasNavbarVisible from ViewReset.qml to fix VPN-6215 because:

• wasNavbarVisible overwrites the default navbar visibility handling which causes the navbar to erroneously stay visible after logout.
• The wasNavBarVisible property is not needed given navbar visibilit is handled in the above code chunk, even when on the Get help menu and Get help sub pages.

Reference

VPN-6215

Checklist

• My code follows the style guidelines for this project
• I have not added any packages that contain high risk or unknown licenses (GPL, LGPL, MPL, etc. consult with DevOps if in question)
• I have performed a self review of my own code
• I have commented my code PARTICULARLY in hard to understand areas
• I have added thorough tests where needed

[mcleinman]

👍🏻 Nice find!