I need to display a table inside the PropertyPane of Client side webpart with New SharePoint development framework.I can see we have property like Toggle, TextField, Button, ChoiceGroup,Dropdown etc under the PropertyPane-> PropertyPaneFields Folder. is it possible to have table control as well in property Pane.
Yes - you can create your own control. Check out this page here - https://dev.office.com/sharepoint/docs/spfx/web-parts/guidance/build-custom-property-pane-controls
There have been changes, so the documentation might be a bit out of date.
yes, see https://github.com/russgove/spfxreactgrid for an example. you put a button in the property pane, that opens a pupup when clicked.