Add inline machine type creation and employee search results

- Add "+ New" button for machine types when adding models on network device pages
  (firewall, switch, server, access point, camera)
- Machine type dropdown now grouped by category (Equipment, Network, PC)
- Add firewall device type to savenetworkdevice.asp
- Remove employee autocomplete dropdown from global search bar
- Add employee search results to search.asp results page
- Update data_cache.asp with null-safe CLng handling

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

includes/topbarheader.asp

@@ -9,7 +9,6 @@ function setCookie(value)
 }
 </script>
 
-
 <header class="topbar-nav">
  <nav class="navbar navbar-expand fixed-top">
   <ul class="navbar-nav mr-auto align-items-center">