[TASK] Filelist: Info dialog shows image dimensions

The file info modal now contains the width and height of images

Resolves: #65822
Releases: master, 7.6
Change-Id: Iadb64ae3db4558bf74f15aaeac1fe29848120563
Reviewed-on: https://review.typo3.org/51052


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>