fix: Mobile style fixes and improvements (#1459)

* fixes #1457 – check for matchMedia function before using it

* fixes: Depth issues
closes #1458

* fixes: Long breadcrumbs cause horizontal overflow

* fix: Improve tabs and overflow on mobile

app/components/LoadingIndicator/LoadingIndicatorBar.js

@@ -18,7 +18,7 @@ const loadingFrame = keyframes`
 const Container = styled.div`
   position: fixed;
   top: 0;
-  z-index: 9999;
+  z-index: ${(props) => props.theme.depths.loadingIndicatorBar};
 
   background-color: #03a9f4;
   width: 100%;