navBarHeightMobile hotfix

When the css variable navBarHeightMobile is set, it does not work correctly. Height of topbar and items is never changed when responsive. The following code will fix the issue, and make it work as expected.

Signed-off-by: Keil Miller Jr <keilmillerjr@me.com>
Merge pull request #1461 from keilmillerjr/navBarHeightMobile-hotfix

navBarHeightMobile hotfix