merge: Improve web interface (#100)

This pull request addresses several issues with the current web interface.

## Implementation Notes :hammer_and_pick:

* Update dependencies of web UI where possible
* Fix deletion of topology
* Fix duplication of topology
* Only display selected metrics
* Use correct color for login button
* Fix z-index of context selector
* Move project selector into masthead
* Reduce height of application header
* Redesign projects page
* Use PatternFly Charts for plots
* Do not fail on stale Redux state
* Fix overflow of topology sidebar
* Fix deletion of portfolios
* Migrate to composable table

## External Dependencies :four_leaf_clover:

* `classnames` has been replaced by `clsx`
* PatternFly Charts have replaced the use of `recharts`

1 files changed, 5 insertions, 1 deletions

diff --git a/opendc-web/opendc-web-ui/src/components/topologies/map/TileContainer.js b/opendc-web/opendc-web-ui/src/components/topologies/map/TileContainer.js
index 21be3c79..0788b894 100644
--- a/opendc-web/opendc-web-ui/src/components/topologies/map/TileContainer.js
+++ b/opendc-web/opendc-web-ui/src/components/topologies/map/TileContainer.js
@@ -28,9 +28,13 @@ import TileGroup from './groups/TileGroup'
 
 function TileContainer({ tileId, ...props }) {
     const interactionLevel = useSelector((state) => state.interactionLevel)
+    const dispatch = useDispatch()
     const tile = useSelector((state) => state.topology.tiles[tileId])
 
-    const dispatch = useDispatch()
+    if (!tile) {
+        return null
+    }
+
     const onClick = (tile) => {
         if (tile.rack) {
             dispatch(goFromRoomToRack(tile.id))