Update animation for UDW slide panels when showing up and when closing as implemented for both tickets Design update for widgets (EZP-31186) and Update animation for Content Tree (EZP-31314) 

Suggested easings values to define for Slide In and Slide Out that will be applied:

• For c-content-create
  • Slide In: ease-in 0.4s after clicking on c-content-create-button__btn
  • Slide out: ease-out 0.2s after clicking on c-content-create__close-button or right after selecting the desired content type.
• For c-selected-location c-selected-location--expanded
  • Slide In: ease-in 0.4s right after selecting the new location or clicking on c-selected-locations__toggle-button
  • Slide out: ease-out 0.2s after clicking on c-selected-locations-item_remove-button or on c-selected-locationsclear-selection-button or on c-selected-locations_toggle-button
• For c-content-meta-preview__language-selector
  • Slide In: ease-in 0.4s after clicking on c-content-meta-preview__edit-button
  • Slide out: ease-out 0.2s after clicking on c-content-meta-preview__close-button