PIM-3426: Fix edit common attributes
Merge pull request #1820 from akeneo/PIM-3426

PIM-3426: Fix edit common attributes
PIM-3434: throw exception when media file does not exist
Merge pull request #1830 from akeneo/PIM-3434

PIM-3434: throw exception when media file does not exist
PIM-3326-stable-static-analysis: Fix checkstyle
Merge pull request #1841 from akeneo/PIM-3326-stable-static-analysis

PIM-3326-stable-static-analysis: Fix checkstyle
PIM-3436: wysiwyg fix