Unify appearance of chakra-ui SelectWidget for single and multiple-choice

[ldorofeeva]

Prerequisites

• I have read the documentation

What theme are you using?

chakra-ui

Is your feature request related to a problem? Please describe.

There are two minor UI issues that could be fixed:

1. Currently the chakra-ui SelectWidget uses Select from chakra-react-select for multi-select and Select from @chakra-ui/react for single-select.
   As the result, styling (especially in dark mode) looks different:
   
   

2. In multi-select, once selected, the values are displayed rather than labels:
   
   

Describe the solution you'd like

1. Use Select from chakra-react-select for both single- and multiple-choice;
2. Display label for selected items in multiple-choice SelectWidget.

If @rjsf/chakra-ui developers are okay with this kind of change, I'd like to contribute.

Describe alternatives you've considered

No response