Add option to view event source (#320)

* Add view source

* Add view source cons

* Change design

* Use PopupWindow instead of Dialog

* Undo changes to Dialog.jsx

src/app/organisms/pw/Dialogs.jsx

@@ -4,11 +4,13 @@ import ReadReceipts from '../read-receipts/ReadReceipts';
 import ProfileViewer from '../profile-viewer/ProfileViewer';
 import SpaceAddExisting from '../../molecules/space-add-existing/SpaceAddExisting';
 import Search from '../search/Search';
+import ViewSource from '../view-source/ViewSource';
 
 function Dialogs() {
   return (
     <>
       <ReadReceipts />
+      <ViewSource />
       <ProfileViewer />
       <SpaceAddExisting />
       <Search />