editor: improves switch types cache handling

OpenRailAssociation / osrd

An open source web application for railway infrastructure design, capacity analysis, timetabling and simulation

https://osrd.fr

GNU Lesser General Public License v3.0

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Closed jacomyal closed 1 week ago

jacomyal commented 1 week ago

This commit fixes #7946.

Details:

Adds a ? to handle case where switch types have not been loaded yet in SwitchList.tsx
Adds a very simple cache to useSwitchTypes to avoid reloading switch types any time a new component mounts with that hook