Add "required" text after asterisk on response elements

Content & configuration

Swagger/OpenAPI definition:

  '/pet/{petId}':
   get:
     tags:
       - pet
     summary: Find pet by ID
     description: Returns a single pet
     operationId: getPetById
     parameters:
       - name: petId
         in: path
         description: ID of pet to return
         required: true
         schema:
           type: integer
           format: int64
     responses:
       '200':
         description: successful operation
         content:
           application/xml:
             schema:
               $ref: '#/components/schemas/Pet'
           application/json:
             schema:
               $ref: '#/components/schemas/Pet'
...
   Pet:
     x-swagger-router-model: io.swagger.petstore.model.Pet
     required:
       - name
       - photoUrls
     properties:
       id:
         type: integer
         format: int64
         example: 10
       name:
         type: string
         example: doggie
       category:
         $ref: '#/components/schemas/Category'
       photoUrls:
         type: array
         xml:
           wrapped: true
         items:
           type: string
           xml:
             name: photoUrl
       tags:
         type: array
         xml:
           wrapped: true
         items:
           $ref: '#/components/schemas/Tag'
           xml:
             name: tag
       status:
         type: string
         description: pet status in the store
         enum:
           - available
           - pending
           - sold
     xml:
       name: pet
     type: object

Is your feature request related to a problem?

It is not clear that the red asterisk on response body elements indicates a required element. The asterisk in the parameter section also includes the word "required" to make this more explicit.

Describe the solution you'd like

Add the following to swagger-ui.css:
.swagger-ui table.model tr.property-row.required td:first-child:after {
font-size: 10px;
position: relative;
top: -3px;
padding: 2px;
content: "required";
color: rgba(255,0,0,.6)
}

Describe alternatives you've considered

Additional context

Start in swagger-ui.css and compare the existing required styling in the parameter section with response model property rows. Add the visible “required” text after the asterisk for required response elements, then verify the Pet example shows the label beside required properties.