Add blueprint eslint plugin (#1892)

* add bp3 eslint plugin

* first eslint runthrough + manual changes

* small fixes

* update snapshots

* update h1 to h4

Co-authored-by: czimergebot <35308261+czimergebot@users.noreply.github.com>

client/src/components/miniHistogram/index.js

@@ -72,7 +72,6 @@ export default class MiniHistogram extends React.PureComponent {
         popoverClassName={Classes.POPOVER_CONTENT_SIZING}
       >
         <canvas
-          className="bp3-popover-targer"
           style={{
             marginRight: 5,
             width,