pages-redirecting-refactor FIXED

• v1.0.1: fix redirecting [add, edit, delete], fix back button style, add back-button on offer-slip previews //todo: offer calls (relies on refactor), fix back-button routing on exception/success & middle-click open tab
• v1.0.2: add session redirect url (fix exception/success routing problem), change modal back-method to session url [add payment]
• v1.0.3: add session redirect url [add(save: refactor) & edit(update) payment, add(save) & edit(update) allocation] ~added session path referer method (get-set) //todo: offer redirecting
• v1.0.4 / v1.0.5: merge, fix offer details back routing. ~fix offer merge (return object, return old id because merged)