[sqllab] table refactor (#2587)

* make react-virtualized table work
use dynamic sizing for cell width
enable filtering
require height prop for result set component

* fix tests and linting

* move some state to props

* move getTextWidth to visUtils

* make striped rows optional

* fix striped proptype

* update name to FilterableTable

* add basic test and fix linting

* accept array of columns keys rather than an array of objects that needs to be mapped

* move container div inside the component

* rename styles

* fit table component to width if it's smaller than parent container

* move stylesheet to javascript folder otherwise it throws an error on npm run prod

* move css to index.jsx

* fix result set spec

* fix linting and test

* fix result set props

* keep list immutable

superset/assets/javascripts/modules/visUtils.js

@@ -0,0 +1,11 @@
+export function getTextWidth(text, fontDetails = '12px Roboto') {
+  const canvas = document.createElement('canvas');
+  const context = canvas.getContext('2d');
+  context.font = fontDetails;
+  const metrics = context.measureText(text);
+  return metrics.width;
+}
+
+export default {
+  getTextWidth,
+};