survey onboarding feedback: misc improvements

survey: add icon and action to redirect after install,add Design Survey button,hide all antoher button in create, if there is answer then View Result highlight otherwise normal, remove res_model field, add preview on chnage question type, add datetimepicker js for frontend datetime input, add Go back to surveys button to go into survey form, and some misc improvements.

<b>Task:</b> https://www.odoo.com/web#id=10490&view_type=form&model=project.task&action=327

<b>Pad:</b> https://pad.odoo.com/p/r.aPTwLf5rpOOKcMLT