Default naming of local data source

[HelenClifton]

Expected behavior

@forman Downloaded a data source and kept the unique ID for the local data source as default. Expected the local data source to be given meaningful name.

Actual behavior

The name of the local data source includes a string of apparently random characters, e.g.

Steps to reproduce the problem

1. Open GUI.

2. Select a remote data source, e.g. esacci.OZONE.mon.L3.NP.multi-sensor.multi-platform.MERGED.fv0002.r1

3. Click on “Download and/or open remote dataset”

4. Enter constraints, e.g.
   

5. Leave "Unique identifier for the new local data source" blank

6. Click on “Download & Open Local"

7. Wait for download to complete, then select Local Data Sources and look at name of new dataset.

Specifications

cate-2.0.0-dev.3 Windows 7 Professional

[forman]

@HelenClifton as it is an ID, it is ok have a string like that.

Maybe the issue should not target the ID but instead ask for providing an editable human-readable title.

@kbernat I suggest we let the open_dataset operation do both

1. generate a unique ID if not provided (like it is done now)
2. generate a human-readable title if not provided (new)

In the GUI, users should be able to change the title, not the ID.

What do you think?