* people module directory restructuring
* Extract PeopleSearchFieldComponent to reuse most part of it
* Transform PeopleSearchFieldComponent to the form we want to reuse
* People selector component, first try
* Remove material grid from start-task.component, first part
* Styling and i18n
* clear button for deleting the selected assignee
* Remove people preloading, remove combobox and update assigneeId
* Fix existing tests
* Add new tests
* Final css fixes
* [ADF-2095] Start Task - The start button should have the primary colour.
* fixed start button should have the primary colour.
* [ADF-2095] Start Task/Process - The start button should have the primary colour.
* fixed start button should have the primary colour and Uppercase.
* * Start task button should have the primary colour
