Stop including a hash when "naming" symbols and colorramps

[havatv]

After adding collections that contain symbol XML files, the symbols and colormaps become available in the style manager, labelled with the symbol name and then a hash in parenthesis.
For the conveyor_belt symbol from Anita's repository it looks like this:
conveyor_belt (60685b8c90da65411a0ce53b2443f95f9d9ef393)
Using the repository name instead of the hash would be more user friendly.