'Select File' button isn't presented for 'image/*' media types in binary format

[VjacheslavVytjagov]

Q&A (please complete the following information)

• OS: [Windows 10]
• Browser: [chrome]
• Version: [67]
• Method of installation: [dist assets]
• Swagger-UI version: [3.17.1]
• Swagger/OpenAPI version: [OpenAPI 3.0]

Content & configuration

Example Swagger/OpenAPI definition:

openapi: 3.0.0
info:
  version: '2018-05-07T12:39:34Z'
  title: OCR API
servers:
  - url: http://api.example.com/v1
    description: Optional description
paths:
  /imagesValid:
    post:
      requestBody:
        content:
          application/octet-stream:
            schema:
              type: string
              format: binary
      responses:
        '200':
          description: Optional description
          content:
            text/plain:
              schema:
                type: string
  /imagesInvalid:
    post:
      requestBody:
        content:
          image/png:
            schema:
              type: string
              format: binary
      responses:
        '200':
          description: Optional description
          content:
            text/plain:
              schema:
                type: string

Swagger-UI configuration options:

SwaggerUIBundle({
        url: "./swagger.json",
        dom_id: '#swagger-ui',
        deepLinking: true
})

Describe the bug you're encountering

There is no button 'Select file' in 'Try it out' mode for 'image/*' media types.

To reproduce...

Steps to reproduce the behavior:

1. Go to '/imagesValid' resource
2. Click on 'Try it out'
3. Make sure that 'Select file' button is presented
4. Go to '/imagesInvalid' resource
5. Click on 'Try it out'
6. Make sure that 'Select file' button isn't presented

Expected behavior

I expect that 'Try it out' panel will contain button to select file for media types 'image/*' , not only for 'application/octet-stream'.