Provide functionality to group images together when they were part of the same timelapse or burst. This will be especially usefull when timelapse photos are mixed with single-shots, or when importing from a sports camera like Gopro.

Photos from the same timelapse are assumed to have an increasing number in their filename (IMG0001.jpg, IMG00002.jpg and so on). They will be also taken with the same time interval between each other (ex. every 30 seconds or so).