* #1163 - added read-only properties 'validity' and 'validationMessage' to all nine form controls
* #1163 - added base support for showing form validation messages below the form controls
* #1163 - animated validation errors in demo
* #1181 - Removed all previous changes that have been validation error specific
* Started with 'Inline validation' demo / fixed merge issues / etc.
* #1181 - continued work on missing form validation features
* #1181 - enhanced validation support for SlColorPicker / some cleanup
* #1181 - fixed CSS issues
* #1181 - fixed again CSS issues
* '1181 - added form validation features finally working
* #1181 - bug fixes
* #1181 - fixed open issues / added API doc comments
* #1181 - updated inline validation demos / removed some legacy code
* #1181 - finished invalid form validation example
* #1181 - added tests / several bugfixes
* #1181 - fixed typos etc.
* #1181 - tests
* #1181 - tests
* #1181 - tests