supertuxkart/stk-code — pull request #1530 by marcoll (2014-09-13 08:45:20+00:00)
Title: Some improvements to the GP editor

Second try, this one includes the suggestions made by konstin to the first one.
- GP are now classified into groups, just like tracks: standard, user defined, and add-ons
- allow empty GPs to be loaded by the GP manager, so that they can appear
on the GP editor (but not on the track selection screen)
- enable/disable buttons depending on the available options
- provide some feedback after pushing the "save" button
- some minor bug corrections and improvements