feat: Sharing improvements (#1388)

* add migrations

* first pass at API

* feat: Updated share dialog UI

* tests

* test

* styling tweaks

* feat: Show share state on document

* fix: Allow publishing share links for draft docs

* test: shares.info

app/components/Tooltip.js

@@ -18,6 +18,10 @@ class Tooltip extends React.Component<Props> {
 
     let content = tooltip;
 
+    if (!tooltip) {
+      return this.props.children;
+    }
+
     if (shortcut) {
       content = (
         <React.Fragment>