Syncing data with remote storage shoul always be preventable

[tobmaster]

In every mobile application, especially in an offline first environment it should always be possible to prevent a sync to the server when it hasn't happened already.

Cases:

• The user has accidentically choosen the wrong image to upload
• The data is big and the user recognizes it to late and doesnt want to burden his dataplan that much
• The original reason for storing the data is no longer reasonable.

There are many applications on mobile devices where the sending, once pressed the button, is no longer preventable. For example Hangouts where you send a picture but in the last second recognize it was the wrong one, then the app can't upload because of slow speed but also don't let you abort the upload.