BAP-17123: Update dashboard and sidebar widgets selector dialog (#18350)
BAP-17123: Update dashboard and sidebar widgets selector dialog (#18350)

* BAP-17123: Update dashboard and sidebar widgets selector dialog
 - added `iconClass` options for widgets dashboard widgets configuration
 - added all icons for dashboard widgets
 - colors palette
 - changes from redesign header branch
 - updated selectors for WidgetPickerModal
 - updated styles
orocrm/OroCalendarBundle,orocrm/OroCalendarBundle,orocrm/OroCalendarBundle