v4.5.9.27 release

v4.5.9.27 had three bug fixes.

Significant defects addressed

• Corrected an issue preventing display of the add_circle_outline icon in the URLs widget.
• Corrected an issue that prevented editors from assigning content forms having a site-specific scope to a role.
• Corrected an issue in which methods in the class HandlebarsTemplateRenderer created repeated objects that caused heap exhaustion.