Refactor MASEditor

Failing cucumber tests
Keeps toolbar enabled
Fixes text padding issue on categories input

Padding was being removed when hovering or focussing the input
Move MASEditor dough component hook
Add two additional tests to MASEdtior to ensure saving and converting is happening correctly
Remove redundant utilities JS
Remove redundant application.js

All JavaScript is now split into individual Dough components and
initialised via dough-data attributes
Fix linting error
Merge pull request #41 from moneyadviceservice/maseditor-refactored

MASEditor refactored as Dough component