Removed the necessity of defining replyToRegisterInputFieldType() method in each field type definition class.
- Done with reconstructing the definition of textare field type.
- Moved the field specific CSS rules of text and textarea from the property base class.
- Adjusted the settings of array fields of textarea and text field types for the new structure.
Fixed a typo in a property name.
Changed not to pass the field type slug to let the class use the slugs defined internally.
Commented out unnecessary lines in the text and textarea field types.
Deprecated the getDefaultKeys() method that defines the field type's default key-values and added the $aDefaultKey property to define them instead.
- Done with reconstructing the color field type.
- Cleaned up the code of the default field type.