EZP-31612: use custom tag choice labels

[SerheyDolgushev]

Question	Answer
JIRA issue	EZP-31612
Bug/Improvement	yes
New feature	no
Target version	2.0
BC breaks	no
Tests pass	yes
Doc needed	no

Steps to reproduce:

1. Create a custom tag with choices attribute:

custom_tags:
    factbox:
        template: '@ezdesign/custom_tag/factbox.html.twig'
        icon: '/bundles/factbox/img/icons.svg'
        is_inline: false
        attributes:
            options:
                type: choice
                choices:
                    - option1
                    - option2
                default_value: option1
                required: true

2. Create translations for choice labels:

ezrichtext.custom_tags.factbox.attributes.options.choices.option1.label: 'Option 1'
ezrichtext.custom_tags.factbox.attributes.options.choices.option2.label: 'Option 2'

3. Open OE and insert the custom tag

Expected result:
Choice label translations will be shown

Actual result:
Choice values are shown instead of translated labels

TODO:

• Implement feature / fix a bug.
• Implement tests.
• Fix new code according to Coding Standards ($ composer fix-cs).
• Ask for Code Review.

[SerheyDolgushev]

Sorry @dew326, is there anything that prevents it from being merged?

[dew326]

No, It's ready for merge.

[lserwatka]

@dew326 could you merge it up?

[dew326]

Merged up to master