WordPress plug in for support section of website?

I have a WordPress site using avada theme

I need to create a support Section on the site that can be easily updated by non programmers

Ideally I need a tree. View. On left, with expandable nodes, and when you click on a tree item/node, it would load content on right panel
The content may contain text, images and pictures

I would also like a search facility for.This support section of the website

Are there any plug ins etc that can do this?
websssCEOAsked:
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Peter HartCommented:
do you mean a support service for a business and you want helpdesk people to log on and deal with the support tickets?

WSDEsk is one such plugin:

https://wsdesk.com/

overview here:

https://www.youtube.com/watch?v=HKWzWOwI9WY
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