feat: Backlinks (#979)

* feat: backlinks

* feat: add backlinkDocumentId to documents.list

* chore: refactor
fix: create and delete backlink handling

* fix: guard against self links

* feat: basic frontend
fix: race condition

* styling

* test: fix parse ids

* self review

* linting

* feat: Improved link styling

* fix: Increase clickable area at bottom of doc / between references

* perf: global styles are SLOW

app/components/Tooltip.js

@@ -201,13 +201,21 @@ type Props = {
   offset?: number,
 };
 
-const Tooltip = function({ offset = 0, ...rest }: Props) {
-  return (
-    <React.Fragment>
-      <GlobalStyles offset={offset} />
-      <TooltipTrigger {...rest} />
-    </React.Fragment>
-  );
-};
+class Tooltip extends React.Component<Props> {
+  shouldComponentUpdate() {
+    return false;
+  }
+
+  render() {
+    const { offset = 0, ...rest } = this.props;
+
+    return (
+      <React.Fragment>
+        <GlobalStyles offset={offset} />
+        <TooltipTrigger {...rest} />
+      </React.Fragment>
+    );
+  }
+}
 
 export default Tooltip;