Fix Save failed issue in dynamicGet. #1148. Move all [TEXT, EDITOR, TEXTAREA] fields from [NOT NULL] to [NULL]. Add the DateHelper class and improve the date methods. Add simple SessionHelper class.
Fix site view form missing classes in J4+. Fix permissions tab in items in J4+. Fix site display controller checkEditId function in J4+. Add class methods to the HtmlView classes in J4+. Fix broken toolbar call in HtmlView in J4+.
