Fix overflow of long client names

Summary: Look client names were unreadable due to line wrapping

Reviewed By: jknoxville

Differential Revision: D18348602

fbshipit-source-id: 682c3b17ef73ca0bf0f8193f71a608ada5cdfbf2

src/chrome/MainSidebar.tsx

@@ -75,6 +75,7 @@ const SidebarButton = styled(Button)(({small}: {small?: boolean}) => ({
   background: 'none',
   padding: 0,
   justifyContent: 'left',
+  whiteSpace: 'nowrap',
 }));
 
 const PluginShape = styled(FlexBox)(