Minor improvements

Summary:
Some styling fixes and minor improvements in DataTable, used by network plugin:

- be able to customise the context menu
- be able to customise how entire rows are copied and presented on the clipboard to be able to deviate from the standard JSON
- deeplink handling was made async, this gives the plugin the opportunity to first handle initial setup and rendering before trying to jump somewhere which is a typical use case for deeplinking

Reviewed By: passy

Differential Revision: D27947186

fbshipit-source-id: a56f081d60520c4bc2ad3c547a8ca5b9357e71a1

desktop/flipper-plugin/src/__tests__/test-utils.node.tsx

@@ -402,7 +402,7 @@ test('plugins can receive deeplinks', async () => {
   });
 
   expect(plugin.instance.field1.get()).toBe('');
-  plugin.triggerDeepLink('test');
+  await plugin.triggerDeepLink('test');
   expect(plugin.instance.field1.get()).toBe('test');
 });
 
@@ -424,7 +424,7 @@ test('device plugins can receive deeplinks', async () => {
   });
 
   expect(plugin.instance.field1.get()).toBe('');
-  plugin.triggerDeepLink('test');
+  await plugin.triggerDeepLink('test');
   expect(plugin.instance.field1.get()).toBe('test');
 });
 
@@ -455,7 +455,7 @@ test('plugins can register menu entries', async () => {
   });
 
   expect(plugin.instance.counter.get()).toBe(0);
-  plugin.triggerDeepLink('test');
+  await plugin.triggerDeepLink('test');
   plugin.triggerMenuEntry('createPaste');
   plugin.triggerMenuEntry('Custom Action');
   expect(plugin.instance.counter.get()).toBe(4);