[4.0] Generic Sidekick Component with `open: true` does not open automatically

[Arthurk12]

Describe the bug
When injecting a generic sidekick component, it is possible to specify a value for the open property. However, when passing open: true, the injected panel does not open automatically upon injection.

To Reproduce
Steps to reproduce the behavior:

1. Set up the sample-generic-content-sidekick-plugin
2. Change the sample code to inject panels with open: true
3. Join a meeting
4. Notice that the panel is not opened

Expected behavior
The panel should open automatically as soon as it is injected by the plugin.

Actual behavior
The panel remains closed even when injected with open: true.

BBB version: v4.0.x-develop bigbluebutton/bigbluebutton@bdf7a46
Plugin SDK version: v0.1.17