[FIX] web: notebook: remove fade effect on tab switch

Also, fixed two global variables introduced by rev b2e32a8f7e7d0b
[FIX] website_blog : identation problem, and unused variable
[FIX] web: makes last breadcrumb item clickable

clicking on last breadcrumb item should reload the current view
[FIX] web: fix various syntax problems in views.js

linting views.js revealed some problems.  Most of them minor, but
some of them more serious: redeclared variables in if clauses can
shadow the outer variable, or not.  It is fragile, and will cause bugs
if the code is refactored.
[IMP] purchase_requisition : onboarding of purchase views
[IMP]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.