Implement lightboxSize in tl_layout for files

[MacKP]

Checklist before I submit this issue report

I confirm that:

• [x] I have tested this with the latest version available
• [x] I have read documentation @ http://metamodels.readthedocs.org/en/ or http://metamodels.readthedocs.org/de/
• [x] I have checked the Contao community forums for references https://community.contao.org/
• [x] I have checked existing issues for duplicates and found none @ https://github.com/MetaModels/core/issues?q=is%3Aissue

My environment is:

(Please fill in the actual values from your environment - check Contao Manager or use composer show)

Key	Value	Comments
PHP version:	7.4.x
Contao version:	4.9.x
MetaModels version:	2.2.0

Issue description

lightboxSize in the tl_layout is not used for the Lightbox Images at the Moment.

[zonky2]

How can I check this?

[MacKP]

1. Set lightboxSize in the PageLayout
2. Goto Rendersettings -> Check Link or Lightbox in file Attribute
3. Goto Frontend and klick on Image for the Lightbox-View.

[MacKP]

The Size is in -> unserialize($GLOBALS['objPage']->getRelated('layout')->lightboxSize))

[0] -> width [1] -> height [2] -> ID of ImageSize

with and height are only set if you set it in the PageLayout.

[zonky2]

MM 2.2 implemented