Enhancement: Give OcModal the option to use OcContextualHelper

[lookacat]

Description

See owncloud/web#6892 (comment)

Related Issue

owncloud/web#6892

Motivation and Context

Why new props instead of using slot: So we can use it via code without markup

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests

Checklist:

• Code changes
• Unit tests updated
• Acceptance tests added
• Documentation added/updated

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[AlexAndBear]

I am not quite sure if we should do this.
It would be better to use a slot for the message and implement the contextualHelper there.

[lookacat]

The slot method is not suitable because we create the modal via code, we have no option there to dynamically provide a template

[AlexAndBear]

As far as I know it will be rendered in the code via vue template anyways.So it should be quite possible to pass a new variable for the ct helper in web.

It's just not a good approach at the end to add a lot of components we have to the modal it self.

[AlexAndBear]

Rechecked, the slot won't be used in the app.vue, so I agree that's the easiest solution here.