KColorCombo modifications

[David Jarvie]

I'd like to amend KColorCombo to provide the option to specify the list of 
colours for it to use instead of the standard set. This would involve the new 
method:

void setColors(const QList<QColor>&);

I also want to add a method to determine if the currently selected colour is a 
custom colour or one of the preset list:

bool isCustomColor() const;

I need both these methods in KAlarm. Currently it uses a separately 
implemented class, but I could use KColorCombo if these changes are made. If 
there are no objections in principle, I'll go ahead and write a patch.

-- 
David Jarvie.
KAlarm author and maintainer.
http://www.astrojar.org.uk/kalarm