preserve selection during filter changes

Summary:
During filter changes, DataTable would loose any selections made, which was posted multiple times as papercut

I didn't implement preserving multi line selections. That should be straightforward, but wasn't sure that'd be desirable or not.

Changelog: DataTable: Data tables will now preserve the current selection and scroll it into view when changing the search filter.

Reviewed By: aigoncharov

Differential Revision: D36736496

fbshipit-source-id: 401ef351c847f58a5d411cf9f352390f6a110b24

desktop/flipper-plugin/src/ui/data-table/DataTableManager.tsx

@@ -110,7 +110,7 @@ type DataManagerConfig<T> = {
   enablePersistSettings?: boolean;
 };
 
-type DataManagerState<T> = {
+export type DataManagerState<T> = {
   config: DataManagerConfig<T>;
   usesWrapping: boolean;
   storageKey: string;