ISAICP-8330: Style the new page layouts.

See merge request digit/digit-joinup-dev!1101

EPIC-7806: Archive a Solution entity.

See merge request digit/digit-joinup-dev!1071

EPIC-7858: Solution page improvements.

See merge request digit/digit-joinup-dev!1056

ISAICP-8441: Remove Editing capabilities from a Solution custom page once solution is archived

See merge request digit/digit-joinup-dev!1160

ISAICP-8411: Deny access to 'common' routes if the group is archived.

See merge request digit/digit-joinup-dev!1151

ISAICP-8398: Contact form NULL.

See merge request digit/digit-joinup-dev!1139

ISAICP-8216: Add "share" feature on custom pages.

See merge request digit/digit-joinup-dev!1157

ISAICP-8182: Unarchive sub-content of a solution being unarchived

See merge request digit/digit-joinup-dev!1147

ISAICP-8431: Increase limit of abstract field from 200 to 250.

See merge request digit/digit-joinup-dev!1154

ISAICP-8424: Some behat tests became extremely slow

See merge request digit/digit-joinup-dev!1159

ISAICP-5762: Remove codebase of persistent_login, password_policy, email_registration.

See merge request digit/digit-joinup-dev!1155

ISAICP-8182: Items archived prior to the solution archival, are also returned to published state anyway.

ISAICP-8433: Attach ventuno/tabledrag CSS library to Quick Links menu edit form

See merge request digit/digit-joinup-dev!1152

ISAICP-8182: Archive solution sub-content with WorkflowHelper instead of adding new transition to community content