Better color support for tasks

[GoogleCodeExporter]

Now, the color of a task is stored as a string matching a given ColorList.

Instead, the color itself should be stored. The following needs to be done:
* change the datamodel - use Data (with an NSKeyedArchiver) instead of String 
for storing colors 
* change the Edit Task panel - need a ColorWell instead of the color PopUpMenu
* create a MappingModel - how do I map the current string to a color?

Original issue reported on code.google.com by peter.ljunglof@heatherleaf.se on 23 Jan 2009 at 11:08

[GoogleCodeExporter]

Fixed in r40

Original comment by peter.ljunglof@heatherleaf.se on 1 Jun 2009 at 9:32

• Changed state: Fixed