* typo - screens not being sent to page save
* removed children arg from hydrateChildren (n/a)
* initialiseChildren does not rerender unless forced
* removed derivatives of initialiseChildren
* renamed initialiseChildren > attachChildren
* standard-components - refactoring
div now container
H1, h2... etc now Heading with type
Select now takes option as _children
* loads of bug fixing
* safe props creation
anytime props are loaded,
we make sure they conform to the components props definition
* Implement collapsing component hierarchy.
* Save screen when adding new components.
* Allow creation of nested child components.
* Fix level-based indentation of hierarchy.
* Rename updateComponentProps to setComponentProps
* Save layout information to the disk.
* Cleanup: switch to autosubscriptions to prevent memory leaks, remove unused imports.
* Remove unused css.
* Fix incorrect subscription.