Feature: #105742 - Synchronized manipulation of all crop variants 

Description 

The image manipulation wizard allows images to be cropped using multiple crop variants. When there were many variants, each one had to be edited individually, and all changes had to be made manually multiple times. This became particularly tedious when the editor wanted to apply precisely the same crop values across all variants.

This feature introduces a new checkbox that allows the editor to crop all variants simultaneously. The prerequisite for enabling this checkbox is that all crop variants must be defined with identical aspect ratios and other identical configuration (apart from its title).

A new sub-option of the cropVariants TCA/TCEFORM option array called excludeFromSync allows developers to exclude specific crop variants from being affected by synchronized cropping.

This is useful, for example, when a special crop variant for a list view is added to the standard set of crop variants, and its differing configuration should still allow the other crop variants to be synchronizable.

Example 

The following code is the definition of the standard crop variants for a bootstrap-based template.

All crop variants are defined identically (except the title) to enable the synchronized cropping feature.

But for tx_news, a new crop variant for the listview is added, and excludeFromSync = 1 is used to specifically allow one exemption of the synchronize-feature.

TCEFORM.sys_file_reference.crop.config.cropVariants {
    xxl {
        title = Very Large Desktop
        selectedRatio = NaN
        allowedAspectRatios {
            # [...] array of defined aspect ratios (identical!)
        }
    }

    xl {
        title = Large Desktop
        selectedRatio = NaN
        allowedAspectRatios {
            # [...] array of defined aspect ratios (identical!)
        }
    }

    # [...]
}

# Override for news extension
TCEFORM.tx_news_domain_model_news.fal_media.config.overrideChildTca.columns.crop.config.cropVariants {
    listview {
        title = List view
        selectedRatio = default
        excludeFromSync = 1
        allowedAspectRatios {
            # [...] array of a custom aspect ratio definition
            # (or identical aspect ratios, but not taken into account
            # for synchronized cropping)
        }
    }
}

Impact 

The editor is now able to apply changes to the image aspect ratio and the image cutting to several matching crop variants at once inside the image manipulation cropping GUI. Exemptions for specific cropVariants can be set.