Shortcodes and extra features for Phlox theme

Authenticated (Contributor+) Stored CrossSite Scripting via Modern Heading and Icon Picker Widgets vulnerability <= 2.16.3

Authenticated (Subscriber+) PHP Object Injection via auxin_template_control_importer vulnerability <= 2.16.2

Authenticated (Contributor+) Stored CrossSite Scripting vulnerability <= 2.15.5

Broken Access Control vulnerability <= 2.15.7

Cross Site Scripting (XSS) vulnerability <= 2.15.4