[Bug]: UX: bad mail notification trigger

### ⚠️ Before submitting, please verify the following: ⚠️

- [x] This is a **bug**, not a question or a configuration issue.
- [x] This issue is **not** already reported on Github (I've searched it).
- [x] Nextcloud Server and Desktop Client are **up to date**. See [Server Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions.
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/)

### Bug description

This describes problems in UX on that dialog box.
The many mail triggers cause problems, written below.

IMHO:
- User needs time to prepare, and no bogus mails should be sent.
- i plea for a "Confirm button" and remove the field-triggers (akin to web)

At the following point in UX, an Email address has been entered, and a mail has already been sent:
Sidenote: At the time of writing the server suffers from https://github.com/nextcloud/server/issues/48908, so for bug's will, that mail is not being sent.

### Steps to reproduce

With the following unwanted effects.

- After entering the address, mail goes out immediately (probably good? unlike web.)
- When "note to recipient" is checked, the mail goes out immediately, containing the wrong message "**Enter a note for the recipient**". The user will then enter a new message, **triggering yet another mail**.
- When "Password protect" is checked, the mail goes out immediately, **not waiting for the user to enter their own passwd**. Changing the password **will trigger yet another mail**.

### Expected behavior

I think mimicking the UX closely to web is ideal, namely:
- (maybe) auto-open the option dialog **right after** full email entering.
- this could be interesting behaviour because any defaults (like server-side expiration dates) are **at once perceived**, preventing further unwanted results.
- the option dialog should have ie. a "Confirm and send" button
- all inline box triggers should be removed in favour of that button.
- no unwanted mails go out.

So the user can prepare that communication package, and confirm.

### Which files are affected by this bug

none

### Operating system

macOS

### Which version of the operating system you are running.

Macos 13.6

### Package

Official macOS 12+ universal pkg

### Nextcloud Server version

30.0.1

### Nextcloud Desktop Client version

3.14.2

### Is this bug present after an update or on a fresh install?

Updated from a minor version (ex. 3.4.2 to 3.4.4)

### Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

### Are you using an external user-backend?

- [x] Default internal user-backend
- [ ] LDAP/ Active Directory
- [ ] SSO - SAML
- [ ] Other

### Nextcloud Server logs

_No response_

### Additional info

_No response_