#302: 'Listen on' CKEditor template for podcasts

[komejo]

What issue(s) does this solve?

Adds CKEditor template for the podcast 'Listen On' icons.

• Issue Number: Add options to podcasts #302

What is the new behavior?

Icons! Add links in CKEditor.

Profile requirements:

• Does deploying this change require a change to config at the site level (choose one)?
  • No config change is required.
  • Yes, and I have written an update hook to apply these config changes.
  • Yes, and I've included updating instructions to be added to the release notes. The next release will need to be a major version increase. (Only do this in special cases.)

Site-level pull requests for testing. Only merge when these PRs are approved:

Create or update any site-level pull requests following the documentation

• Flagship PR: https://github.com/wri/wriflagship/pull/1226

Checked on develop (TA to do)

• Brasil
• China
• Indonesia

[mariacha]

Code seems good! I'll update the ticket if I find something once I play around with it on the multidev.