Updates and Fixes

• Fixed scope issue in the Accessor Module
• Ensured that the this context of event callbacks is set to the table that called them
• The row data array is now correctly passed to the dataLoaded callback when triggered by an ajax request
• A warning console message is now displayed when setColumns is called before the table is initialized
• A scoping issue has been fixed in the Reactive Data module
• The bootstrap 4 theme has been updated to prevent graphical collision of even rows when frozen columns are enabled
• Header filters are now correctly applied when grouped rows are in use
• Added the mock deinitializeHeight function to the Group class to prevent rendering errors
• Updated the deepClone helper function to prevent an infinite loop when recursive data structures are used