🔨 Switch StorageManagementModal to use useOvermind

[MichaelDeBoey]

Follow-up of #2808, #2828 & #3081

Things I did extra:

• Change addedFileToSandbox's signature to get its argument types directly from UploadFile instead of hardcoding them
• Change deletedUploadedFile's signature to accept a string instead of { id: string }, because it only has 1 argument
• Refactor Button out of AddFileToSandboxButton & DeleteFileButton
• Move overmind subscriptions as close as possible to the components itself instead of passing it through
• Put all styles into the elements.ts file

[lbogdan]

Build for latest commit 11aba1b is at https://pr3438.build.csb.dev/s/new.

[SaraVieira]

@MichaelDeBoey Can you please fix the conflicts?

[MichaelDeBoey]

@SaraVieira Rebased on upstream/master 🙂

[SaraVieira]

There is an issue with the buttons :(

[SaraVieira]

Thank you!

[MichaelDeBoey]

With pleasure! 🙂