Summary:
This is a collection of small UI fixes for the network plugin:
- image maxWidth is set to 100% to not cause vertical scrolling
- Panels now have horizontal scrollbars, if their content overflows
- fixing missing icon for failed network requests
- removing position sticky from table headers as it was not used and causing some rendering issues and performance problems
- Adding a `label` and `grow` option to the `Select`-component which is used in the sidebar of the network plugin.
Reviewed By: passy
Differential Revision: D12956336
fbshipit-source-id: 6e7e9cf97c058a2ff626576d4afdc6df65007ea1
8ab52839fb