Add storage space check for image captures.

[rluzuriaga]

Currently, when capturing an image and the storage node disk is full, the output message is not very descriptive.
Current output message: Failed to create image capture path (prepareUploadLocation)

There was this forum post that made me think that maybe there should be a check if the storage node disk is full and display a more descriptive message.

What do you think @Sebastian-Roth?
I could start work on this later in the week.

[Sebastian-Roth]

Definitely a good idea! Will be interesting to see how you can get that information from the server to the client machine.