Fixes a critical bug with deferred binding when using PostgreSQL.

UX/UI Improvements

• Improved Repeater styling by styling items as individual "panels" and added an index tracker to the side of each item
• Added support for displaying the required indicator next to form fields that are marked as required with nested validation: property.*.subfield
• Automatically use field labels as custom attribute names in validation messages thrown by the Form widget

API Changes

• Added inline-options property to checkboxlist field type to display checkboxes inline
• Added fromUrl() method to the File model for creating a file from a provided URL

Bug Fixes

• Fixed critical bug with deferred binding when using PostgreSQL