Matrix dynamic in property grid rendered incorrectly

[SamMousa]

Describe the bug I'm rendering a matrix dynamic question inside the property grid, but it renders incorrectly:

• The add row button is missing
• The delete row button has no styling

Steps to reproduce

See https://plnkr.co/edit/smcxH7T8pxw0IqSw

Expected behavior I'd expect to be able to use a matrixdynamic question.

Screenshots

Please complete the following information:

• Browser: Firefox, Chromium
• Browser version: latest
• JS framework/library: React / knockout / vanilla
• SurveyJS version: latest
• Device: PC

Additional context