* [DW-180] Start Process - Improve the look and feel.
* Created custom-button directive to have custom buttons inside the form.
* Updated en.json.
* Refactored start-process component.
* Added a property showEventIcon in start-form component.
* [DW-180] Start Process - Improve the look and feel.
* Refactored start-process scss file.
* Added some scss class to the html in start process/form components.
* Updated en.json.
* Added ViewEncapsulation none.
* [ADF-1672] Start Process - Improve the look and feel .
* Removed Event icon.
