Update customizing VLT

[danalvrz]

• [x] I have granted permission to publish my contribution according to Granting permission to publish. Minor typographical corrections and other contributions that are not "material in nature" are exempt from this requirement.
• [x] I followed the guidelines in Contributing to Plone Training.
• [x] I verified there aren't any other open pull requests for the same change.
• [x] I successfully built the documentation and ran quality checks on my changes locally according to Building and Checking the Quality of Documentation.
• [x] If needed, I added new terms to the Glossary file glossary.md and referenced them in the documentation. Note that terms that are defined in external Sphinx documentation, including Plone 6 documentation, may be referenced with a {term} directive without adding the definition to the local glossary.md file.

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📚 Documentation preview 📚: https://plone-training--978.org.readthedocs.build/

[iRohitSingh]

@danalvrz I went through all the code of exercise. I found some issue in hero block

1. Title align not working if there is no image in hero block edit mode
2. Same for subtitle
3. object_browser not working if we remove the selected image in hero block.
4. Another currently there is no initial width but we should have for hero block. see the screenshot for reference

[iRohitSingh]

@danalvrz I went through all the code of exercise. I found some issue in hero block

1. Title align not working if there is no image in hero block edit mode
2. Same for subtitle
3. object_browser not working if we remove the selected image in hero block.
4. Another currently there is no initial width but we should have for hero block. see the screenshot for reference

@danalvrz Fixed .

[stevepiercy]

Sorry, I won't have time to give this a thorough review before the training tomorrow

I would strongly suggest that you perform the following checks to make sure you don't have any glaring errors or warnings.

• https://training.plone.org/contributing/setup-build.html#livehtml
• https://training.plone.org/contributing/setup-build.html#id1
• and optionally https://training.plone.org/contributing/setup-build.html#overriding-configuration-options if you find that some checks are too noisy