src/vs/workbench/contrib/scm/browser/scmViewPane.ts/ListDelegate/getHeight
class ListDelegate:	getHeight(element: TreeElement) {
		if (isSCMInput(element)) {
			return this.inputRenderer.getHeight(element);
		} else if (isSCMActionButton(element)) {
			return ActionButtonRenderer.DEFAULT_HEIGHT + 10;
		} else {
			return 22;
		}
	}