refactor(charts): add CustomTooltips, add chartId prop

src/utils/getStyle.js

@@ -0,0 +1,10 @@
+// todo
+// temp getStyle fix for IE
+const getStyle = (prop, node) => {
+  const root = node || document.querySelector(':root')
+  const value = window.getComputedStyle(root).getPropertyValue(prop).trim()
+  // console.log('utils/getStyle', value)
+  return value
+}
+
+export default getStyle