Improve successful actions (import, upload, download...) feedback to user

Prototype :
https://pr.to/HW8YN9/

• As a user, in the "add to nuxeo" screen (https://zpl.io/VQWky7P) , if the destination folder is set, when clicking on "ok" (formerly 'save'), I can see a modal view with the word "importing..." and a progress bar

• When progress bar is completed, if I imported one document and that the import was successful, I can see another modal message with the wording "The document {name of document}

  was saved into

  {name of container}

  "

• When progress bar is completed, if I imported more than one document and if the import was successful, I can see another modal message with the wording " {number of documents imported}

  documents have been saved into

  {name of destination container}

  "

• When progress bar is completed, if I imported one document and that the import was not successful, the modal message should be "some files weren't loaded."

• When progress bar is completed, if the import was successful, I can see an animation with a green check above the successful import message.

• When progress bar is completed, if the import was successful, I can feel a light/short haptic feedback.

• When progress bar is completed, if the import was unsuccessful, I can feel a long haptic feedback.

• The display of the successful message should appear for 2.5 seconds, before the screen reverts back to initial screen (such as, photo screen on iOS).
• If the modal message is an error, it should revert to the select destination folder screen