Move to Architecture Components and MVVM

[iamareebjamal]

Reimplement MVP with MVVM through

• Replace Presenters with ViewModels

[iamareebjamal]

This will be done eventually and is already in place, so closing

[sridharjajoo]

@iamareebjamal Can you open this issue because Mario has said that as it hasn't been implemented fully so it needs to be opened.