createCellBelow not honoring source

[emeeks]

Application or Package Used
@nteract/core

Describe the bug
When I fire an actions.createCellBelow({ id: validid, cellType: "code", source: "Some kind of set source", contentRef: validContentRef }) the cell is created properly but is empty.

To Reproduce
fire actions.createCellBelow with a string in source

[captainsafia]

You can try passing a cell property to the createCellBelow action with the cells content, similar to the code below.

nteract/applications/desktop/src/notebook/insert-images.ts

Lines 89 to 98 in f8afe29

	let newCell = emptyMarkdownCell.set("source",
	imageSources.map((src) => `<img src=\"${src}\" />`).join("\n")
	);
	store.dispatch(
	actions.createCellAbove({
	cellType: "markdown",
	contentRef,
	cell: newCell
	})