fix(volume) custom volume cache key needs to include the current project

[edlerd]

Done

• added project to the cache key of the custom volume list
• when switching between projects, the custom volume list needs to be refreshed

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @mas-who or @edlerd for access.
   • With a local copy of this branch, build and run as described in the docs.
2. Perform the following QA steps:
   • create instance > disk > select custom volume, see currently available volumes (ensure at least one is uploaded). Change project to a project with an isolated storage and ensure the list is different.

[webteam-app]

Demo

Jenkins

demos.haus

[mas-who]

LGTM, thanks for the fix