Addon Optimisations

[hamzahio]

Good day marcioj,

Nice addon and want make pull request for optimisations.

1. create one mixin for:
   • save record
   • delete record
   • prevent transition if model has dirty attributes
2. add the mixin to ( new - index - edit ) routes.
3. generate mixin one time on install and never generate when new model generate.
4. add total of record end the table.

if you are ok with this optimisations will send pull request.