make data tables horizontally scrollable if needed

Summary:
Changelog: most data tables allow for horizontal scrolling now if they run out of space

This diff introduces support for horizontal scrolling in datatables. Originally thought about making this a view option, but doing automatically works actually quite fine. By default the columns resize as they did, but if either a column is made bigger or the window is so small no space is left, a horizontal scrollbar can be used.

This adresses several usability issues reported in GH / workplace

fixes https://github.com/facebook/flipper/issues/2608

Reviewed By: antonk52

Differential Revision: D33368216

fbshipit-source-id: 206c761a5873cf0396af091f2cbdedc3e638afac

desktop/flipper-plugin/src/ui/Layout.tsx

@@ -10,13 +10,7 @@
 import React, {CSSProperties, forwardRef} from 'react';
 import styled from '@emotion/styled';
 import {Container} from './Container';
-import {
-  normalizePadding,
-  normalizeSpace,
-  PaddingProps,
-  Spacing,
-  theme,
-} from './theme';
+import {PaddingProps, Spacing} from './theme';
 
 import {renderSplitLayout} from './renderSplitLayout';