Follow-up from "Update Mattermost System Console settings page URL for webhooks"

The following discussion from !31334 (merged) should be addressed:

• @eread started a discussion:

  it on:
  
  - **Mattermost System Console > Integrations > Integration Management** in Mattermost
    versions 5.12 and later.
  - **Mattermost System Console > Integrations > Custom Integrations** in Mattermost
    versions 5.11 and earlier.

  We can tweak in a follow up. Thanks @jasonblais.