delete share confirmation (stable29)

[printminion-co]

Added confirmation dialog analogue to file (>5 files) deletion.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[bromiesTM]

We should try to make this upstreamable
Also please make sure to add yourself to the license header and ensure the compilation works properly

[printminion-co]

changed text in order to be similar to "delete files" confirmation dialog

[thlehmann-ionos]

Mostly OK for me, a couple of minor notes though.

• Looks good to me (cancel does not delete, confirm deletes) 💚
• Unit tests OK ✔️
• Linter OK ✔️
• Code style OK if one review note is addressed (semi-colon) ✔️
• Cypress tests don't seem to test or use this: OK ✔️

1. I'd like to see the semi-colon removed, the superfluous parens removed and the async/await vs. Promise mixture changed
2. I'm undecided on the action button type and leave it up to you since there's no clear guide (you may want to mention this when upstreaming this as a PR)

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