Plugin Channel Header Component Changes

[wiersgallak]

Mattermost recently made an update to the Plugin component location changing from the channel header to the new App Bar.

If your plugin registers an icon in the channel header, you will need to make some minor changes to your plugin to smoothly transition to this new UI. We’ve made it simple to register both a channel header icon and add the new App Bar registration simultaneously. This way, your plugin will work on older servers without the App Bar (using the channel header), and when the App Bar is enabled on a server. The App Bar component will automatically be used instead. You can use this PR as an example of a plugin implementing an App Bar icon.

Please see this forum post for more details on this change and reach out to us on our Integrations and Apps channel with any questions.