Diagram versioning (#560)

* clean up sidesheet

* clean up sharing

* add revisions sidesheet

* update getCommits and clean up

* update date localization

* load diagram in read only mode from previous version

* disable input from control panel and popovers

* add restore warning modal

* separate share and versions

* update versions

* finalize versioning implementation, add pagination

* fix package-lock.json

* clear versions cache on flush storgae

* disable menubar items when in read only mode

* disable remaining fields in readonlt

* suppress eslint only-export-components rule

* show loading version progress

src/components/EditorHeader/SideSheet/Timeline.jsx

@@ -8,7 +8,7 @@ export default function Timeline() {
 
   if (undoStack.length > 0) {
     return (
-      <List className="sidesheet-theme">
+      <List>
         {[...undoStack].reverse().map((e, i) => (
           <List.Item
             key={i}
@@ -24,6 +24,6 @@ export default function Timeline() {
       </List>
     );
   } else {
-    return <div className="m-5 sidesheet-theme">{t("no_activity")}</div>;
+    return <div className="m-5">{t("no_activity")}</div>;
   }
 }