4.0.9

New features

[3971b9b] Improve the help content of CRUD pages (@javiereguiluz)

Bug fixes

[d0dc56e] Fix array to string conversion error in datetime filter (@geordie)
[4676276] Fix deprecation in form type (@javiereguiluz)
[3f0495c] Update Bulgarian translation (@bozhidargyurov)
[9d1f58b] Fix AL flag (@michaelKaefer)