[cms] in the Tabs.jsx section, add an option for grouping visualizations together

[perpetualgrimace]

Currently, Tabs.jsx checks for the existence of a tab key in the d3plus config, which allows you to group visualizations together. But that's overloading the d3plus config with canon props. We should instead handle this explicitly in the interface & database.

function findKey(str, key) {
  const regex = new RegExp(`${key}\\:[\\s]*\\"([^\\"]+)\\"`, "g");
  const match = regex.exec(str);
  if (match) return match[1];
  else return match;
}

const titleKeys = ["tab", "type"];

const tabs = visualizations.map((d, i) => {
  let title;
  for (let x = 0; x < titleKeys.length; x++) {
    title = findKey(d.logic, titleKeys[x]);
    if (title) break;
  }
  return title || `Visualization ${i + 1}`;
});

[jhmullen]

Closing in lieu of #1216