Lens restructure (#540)

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/utils/isReactNode.ts

@@ -0,0 +1,9 @@
+// Type guard for checking valid react node to use in render
+import React, { ReactNode } from "react"
+
+export function isReactNode(node: ReactNode): node is ReactNode {
+  return React.isValidElement(node)
+    || Array.isArray(node) && node.every(isReactNode)
+    || node == null
+    || typeof node !== "object"
+}