[4.x] Allow using Global Set variables in form email configs

[duncanmcclean]

This pull request allows for using Global Set variables in form configs.

Closes #2635.

Example

For example you could have a "Company Information" global with Name & Email fields.

Then, when configuring form emails, you'd be able to reference the global set data just like you would in a normal Antlers template: {{ company_information:email }}

[wm-simon]

@duncanmcclean Hey, is it possible to use page variables in the settings, too? Like {{ page:title }}, {{ page:id }}, etc...

[duncanmcclean]

@duncanmcclean Hey, is it possible to use page variables in the settings, too? Like {{ page:title }}, {{ page:id }}, etc...

No, it's not possible since the form emails have no context of the page you submitted the form on.

To workaround that though, you could pass the page's title/ID along to the form as a hidden input then do whatever you need to do with it.

[wm-simon]

I've added the fields hardcoded to the form:

    <input
    type="hidden"
    name="outlook_id"
    value="{{ bereiche:outlook_id }}"    
    >
    <input
    type="hidden"
    name="page_title"
    value="{{ page:title }}"    
    >

The variables are shown on the website. Now I have to show the content in the mail subject.
That's my code:
[{{outlook_id}}] Neue Bewerbung von {{ first_name }} {{ last_name }} als {{ page_title }}

First and last name are shown in the subject, but not my fields.

[jasonvarga]

The fields need to exist in the form's blueprint.

[wm-simon]

I've tried this, but I couldn't find a solution to show the variable content. Do I need to add my variable to the field, for example, as the default value? I've tried page:title and {{ page:title }}, but the variable is not parsed with the value.

These are not working:

    <input
    type="{{ input_type ?? 'text' }}"
    name="{{ handle }}"
    value="{{ {{ default }} }}"    
    >

    <input
    type="{{ input_type ?? 'text' }}"
    name="{{ handle }}"
    value="{{ default }}"    
    >

I have no idea, how I can define the field names and get the page content to send it with the form.