Need to reload page after uploading image to show the thumbnail

[Quicksaver]

- Do you want to request a feature or report a bug?
bug

- What is the current behavior?
When working on a private repo, new image uploads don't show the thumbnail until you reload the page, leading the user sometimes to think the upload failed because they see a broken thumbnail icon. Apparently the src url of new images don't have the token query parameter that is applied when the page loads, a page reload makes the thumbnail appear as expected.

- If the current behavior is a bug, please provide the steps to reproduce.

• Open media library
• Upload new image
• Wait for image to be uploaded so that its item shows before the others

- What is the expected behavior?
I'd expect the thumbnail to be visible immediately after upload is finished.

- Please mention your CMS, node.js, and operating system version.

Netlify CMS 1.0.3, also tried with latest master running on Node 8.9.3 (lts/carbon).

- Please link or paste your config.yml below if applicable.

backend:
  name: github
  ...
media_folder: "/static/images/uploads"
public_folder: "/images/uploads"

[tech4him1]

This is related to #990.

[erquhart]

Ah, this is because we're constructing the url after the initial upload: https://github.com/netlify/netlify-cms/blob/master/src/backends/github/implementation.js#L139

We'll need to find the best way to get the token, or just fetch the file after upload.

[tech4him1]

I guess we could still construct the URL, then add the token as a query parameter if it's a private repo. That's not necessarily the most maintainable way, though, vs fetching the URL from GitHub or pulling the media through the API.