Summary:
The previous implementation for collapsing sections involved disposing of a view instance (Grid or Chart component). This caused numerous bugs with
linking sections as the implementation is located in the BaseView.js. Now the view instance is kept and attached to a dom in a hidden div, so it can respond
and function as a normal rendered section. It is also passed from between collapsed and main layout, when sections are dragged or moved using section's
menu commands (`collapse` and `add to main page`)
It also implies that the ViewLayout must still be rendered when a section is maximized (as it is responsible for the view instance), so the dom, and
some logic for rendering it, had to be changed.
Test Plan: New and updated
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3826
a9ff6b9a84