Implement deeplink, creating pastes, log deduplication

Summary:
This diff implements the remaining features in the logs plugin:

- deeplinking
- merging duplicate rows

The logs plugin source code has now been reduced from originally `935` to `285` LoC. All optimisation code has been removed from the plugin:

* debouncing data processing
* pre-rendering (and storing!) all rows

Finally applied some further styling tweaks and applied some renames to DataTable / DataSource + types finetuning. Some more will follow.
Fixed a emotion warning in unit tests which was pretty annoying.

Reviewed By: passy

Differential Revision: D26666190

fbshipit-source-id: e45e289b4422ebeb46cad927cfc0cfcc9566834f

desktop/app/src/init.tsx

@@ -228,8 +228,6 @@ const persistor = persistStore(store, undefined, () => {
 setPersistor(persistor);
 
 const CodeBlock = styled(Input.TextArea)({
-  fontFamily:
-    'SFMono-Regular,Consolas,Liberation Mono,Menlo,Courier,monospace;',
-  fontSize: '0.8em',
+  ...theme.monospace,
   color: theme.textColorSecondary,
 });