REACH-115 Separate SaveUploader into Model layer and View layer

`BaseSaveUploader` is base class for `NWKSaveUploader` one. `BaseSaveUploaderView` isn't base for `NWKSaveUploaderView`.
I've made non case sensitive check [here](https://github.com/pboyer/flood/pull/80/files#diff-3ecf27d0211be131869b8c34972eaf8bR44) and [here](https://github.com/pboyer/flood/pull/80/files#diff-3ecf27d0211be131869b8c34972eaf8bR49). In the other places it's used correctly