Property Grid - search works only on properties, not on content - possible to extend?

[MartinFijneman]

Prerequisites

• [x] I have written a descriptive issue title
• [x] I have verified that I am running the latest version of the COMET-IME
• [ ] I have searched open and closed issues to ensure it has not already been reported

Description

Property Grid - search works only on properties, not on content - possible to extend, having search on content as well in this view

Steps to Reproduce

Logs

• [ ] There are no logs regarding the issue
• { ] I have attached a log file or included the relevant section in this issue

System Configuration

• COMET version:
  • [ ] COMET-IME:
  • [ ] Other:
• Web Services:
  • [ ] CDP4/COMET Web Services version:
  • [ ] OCDT WSP version:
• Environment (Operating system, version and so on):
  • [ ] Microsoft Excel (32/64 bit):
  • [ ] Windows OS (32/64 bit):
  • [ ] Additional information: