Closes #223 [Only accepted features should be included in the downloa…

[natrimmer]

This PR addresses Issue #223

It adds an additional button in Prediction.js that allows users to download only the accepted features. This is done by using a new acceptedFeatures state, which is updated through a function prop passed to the EditableGeoJSON.js component. The accepted features are then provided as a parameter to the download function.

[kshitijrajsharma]

Thank you for the PR . I have moved it to testing