HPCC-11667 Advanced menu falls behind nav bar

The advanced menu and search bar falls behind the navigation bar.
Utilize @media query to make items visible if under 960px resolution
which is 1024x768 screen resolution or if the browser window is scaled.

Signed-off by: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
float:right is the default behavior before modifications. float:left happens (which may not be needed due to a block level element) after the screen size change.