Cannot able to link checkbox with display tab for the text field

[parthr-arch]

Describe the bug
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I am not able to add the drop down in the display tab with selection of option to display number of days count for the date range picker.

I want to add checkbox after Modal Edit checkbox

How can i do that?

I am using angular js version 1 for form io

Version/Branch
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To Reproduce
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1. Create form...
2. Add component...
3. Use form...
4. See error

Expected behavior
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