Release April 18

Fixed bug campaign thumbnails do not render for nested campaigns
https://github.com/Pica9/cd-core/pull/5742
Campaign Thumbnails do not render when nested under a Campaign
https://campaigndrive.atlassian.net/browse/CI-99

fix deleting sub campaigns with deleted child campaigns
https://github.com/Pica9/cd-core/pull/5740
Can't delete a nested Campaign within a Parent
https://campaigndrive.atlassian.net/browse/CI-90

Bug while nesting campaigns campaign with sub-campaigns not available for selection
https://github.com/Pica9/cd-core/pull/5737
Campaigns that contain other "Campaign" campaign items are not surfacing in Campaign list
https://campaigndrive.atlassian.net/browse/PC-3287

Comment out Email Dashboard page scenarios from Behat tests
https://github.com/Pica9/cd-core/pull/5736
Email Dashboard page works on test and prod but not anywhere else
https://campaigndrive.atlassian.net/browse/PC-3331

Refresh Full Report or Email Dashboard page does not load
https://github.com/Pica9/cd-core/pull/5734
Refresh Full Report or Email Dashboard page does not load
https://campaigndrive.atlassian.net/browse/PC-3322

Bug address2 not appearing for section style template.
https://github.com/Pica9/cd-core/pull/5733
Address 2 not populating in Section Style Templates
https://campaigndrive.atlassian.net/browse/CI-33

Added filter to category and field inputs
https://github.com/Pica9/cd-core/pull/5709
Update Content DB Field to only allow for alphanumeric input
https://campaigndrive.atlassian.net/browse/PC-3264