merge: Address issues with web UI (#145)

This pull request addresses several issues that have been reported for the OpenDC web UI.

## Implementation Notes :hammer_and_pick:

* Update dependencies for web UI
* Inform user when deleted topology is still used
* Do not offset hover layer after dragging
* Fix access to machines on lower shelves 
* Do not allow selection of empty unit
* Fix rack deletion

Fixes #135, #136, #137, #138, #139

1 files changed, 7 insertions, 1 deletions

diff --git a/opendc-web/opendc-web-ui/src/components/topologies/sidebar/machine/MachineSidebar.js b/opendc-web/opendc-web-ui/src/components/topologies/sidebar/machine/MachineSidebar.js
index 6f89e10b..8a4c33dc 100644
--- a/opendc-web/opendc-web-ui/src/components/topologies/sidebar/machine/MachineSidebar.js
+++ b/opendc-web/opendc-web-ui/src/components/topologies/sidebar/machine/MachineSidebar.js
@@ -15,7 +15,13 @@ import { useSelector } from 'react-redux'
 function MachineSidebar({ tileId, position }) {
     const machine = useSelector(({ topology }) => {
         const rack = topology.racks[topology.tiles[tileId].rack]
-        return topology.machines[rack.machines[position - 1]]
+
+        for (const machineId of rack.machines) {
+            const machine = topology.machines[machineId]
+            if (machine.position === position) {
+                return machine
+            }
+        }
     })
     const machineId = machine.id
     return (