bug #3819 Fix formTypeOptions access if ea_field is null (vic-blt)
bug #3819 Fix formTypeOptions access if ea_field is null (vic-blt)

This PR was merged into the 3.0.x-dev branch.

Discussion
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Fix formTypeOptions access if ea_field is null

Fixes #3818.
If `ea_field` is not defined, then `default` filter will return an empty string.
This will allow these conditions `formTypeOptions.imagine_pattern is defined and formTypeOptions.imagine_pattern is not empty` to be performed.

Commits
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eaa7dd69 Fix formTypeOptions access if ea_field is null

javiereguiluz/EasyAdminBundle,javiereguiluz/EasyAdminBundle