Public gallery improvements (#409)

- [x] Don't show extension in name field for publish
- [x] Open "Your published work" tab after publishing
- [x] Continue showing dialog for Report Abuse status
- [x] For showing COC in Public Gallery tab show backdrop of thumbnails
- [x] Liked -> My Favorites & Your published work -> My published work

src/Explorer/Panes/PublishNotebookPaneComponent.tsx

@@ -172,11 +172,12 @@ export class PublishNotebookPaneComponent extends React.Component<PublishNoteboo
     this.nameProps = {
       label: "Name",
       ariaLabel: "Name",
-      defaultValue: this.props.notebookName,
+      defaultValue: FileSystemUtil.stripExtension(this.props.notebookName, "ipynb"),
       required: true,
       onChange: (event, newValue) => {
-        this.props.onChangeName(newValue);
-        this.setState({ notebookName: newValue });
+        const notebookName = newValue + ".ipynb";
+        this.props.onChangeName(notebookName);
+        this.setState({ notebookName });
       },
     };