Fix network device description/machinenotes display and edit

- Fix ADO cursor issue where reading rs("description") twice caused
  empty values (IsNull check consumed the field value)
- Change all device pages to read description field once using
  `description = rs("description") & ""` pattern
- Add deviceDescription variable in displaydevice.asp
- Fix machinetypeid mapping: IDF=17, Camera=18 (was swapped)
- Add model dropdown fix to include currently assigned model
- Add server application tracking feature
- Various other improvements and fixes

Files affected:
- displaydevice.asp, displaylocationdevice.asp
- deviceaccesspoint.asp, deviceserver.asp, deviceswitch.asp
- devicecamera.asp, deviceidf.asp
- savenetworkdevice.asp, networkdevices.asp

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

updatelinkdirect.asp

@@ -51,6 +51,12 @@ If CLng(linkid) < 1 Then
 	Response.End
 End If
 
+If Len(linkurl) = 0 Or Len(shortdescription) = 0 Then
+	Response.Write("Required fields missing")
+	objConn.Close
+	Response.End
+End If
+
 If Len(linkurl) = 0 Or Len(shortdescription) = 0 Or Len(appid) = 0 Then
 	Response.Write("Required fields missing")
 	objConn.Close