[BUGFIX] Use ProcessedFile::CONTEXT_IMAGEPREVIEW for inline preview images

Using ProcessedFile::CONTEXT_IMAGEPREVIEW respects the ratio and produces
nicer thumbnails.

Change-Id: I8d98dc8ff0a6883c7e03c4dddbdb6d085608904a
Resolves: #71670
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/45996


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>

typo3/sysext/backend/Classes/Form/Container/InlineRecordContainer.php

@@ -324,7 +324,7 @@ class InlineRecordContainer extends AbstractContainer
                         $imageSetup['crop'] = $rec['crop'];
                     }
                     $imageSetup = array_merge(array('width' => '45', 'height' => '45c'), $imageSetup);
-                    $processedImage = $fileObject->process(ProcessedFile::CONTEXT_IMAGECROPSCALEMASK, $imageSetup);
+                    $processedImage = $fileObject->process(ProcessedFile::CONTEXT_IMAGEPREVIEW, $imageSetup);
                     // Only use a thumbnail if the processing process was successful by checking if image width is set
                     if ($processedImage->getProperty('width')) {
                         $imageUrl = $processedImage->getPublicUrl(true);