Fix #1555 : API sessions remains open
Fix z-index issue for datepickers
Merge pull request #742 from romainneutron/fix-1555

Fix #1555 : API sessions remain open
Merge pull request #747 from nlegoff/fix1559

[3.8] Fix #1559 z-index issue for datepickers
Merge branch '3.8'

Conflicts:
	tests/Alchemy/Tests/Phrasea/Application/OverviewTest.php