Delete Opening text

Hi! how to delete or edit the:
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Thank you

If you want to change it you need to edit the language files:

Then rebuild the sources and deploy. If you want to remove it you need to edit the page, which is in features/welcome, both web and mobile are there:

And again rebuild and deploy.

what file do we need to edit to change not the text but the actual structure of the html document?

We need to remove the list of the previously created conference rooms.

You need to download the sources, make sure you can build them and then modify it:

That should be recent-list feature: