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>

addmachine.asp

@@ -167,13 +167,20 @@
                           <select class="form-control" id="newmodelmachinetypeid" name="newmodelmachinetypeid">
                             <option value="">-- Select Machine Type --</option>
 <%
-	Dim rsMachineTypes
-	strSQL = "SELECT * FROM machinetypes WHERE isactive = 1 ORDER BY machinetype ASC"
+	Dim rsMachineTypes, lastCat
+	strSQL = "SELECT machinetypeid, machinetype, category FROM machinetypes WHERE isactive = 1 ORDER BY category, machinetype ASC"
 	Set rsMachineTypes = objconn.Execute(strSQL)
+	lastCat = ""
 	While Not rsMachineTypes.EOF
+		If rsMachineTypes("category") <> lastCat Then
+			If lastCat <> "" Then Response.Write("</optgroup>")
+			Response.Write("<optgroup label='" & Server.HTMLEncode(rsMachineTypes("category")) & "'>")
+			lastCat = rsMachineTypes("category")
+		End If
 		Response.Write("<option value='" & rsMachineTypes("machinetypeid") & "'>" & Server.HTMLEncode(rsMachineTypes("machinetype")) & "</option>")
 		rsMachineTypes.MoveNext
 	Wend
+	If lastCat <> "" Then Response.Write("</optgroup>")
 	rsMachineTypes.Close
 	Set rsMachineTypes = Nothing
 %>