Thats something I would like to see as well.
Your request would require even more statistics, based on colour and not just "converted mana costs" (when you click on the mana column its ordered by total costs).
So your example is ordered manually:
when yozu click on top right button "edit the deck" you see an automatically build list with
//Lands //Spells //CreaturesUsing the classic deck builder you see a button explaining all those options "? Formatting Help"
Basic Format:
One card per line, amount in front of card name separated by a space
Use English or German card names
Sections:
Insert a section heading by starting a line with //
Make a sideboard with the special heading //Sideboard
Card Options:
Comment a single card by putting "#COMMENT" at the end of the line
Define different mana costs for a card by putting "<cost=MANA COST>" at the end of the line
Exclude a card from all mana calculations by adding "<ignore_cost>" at the end of the line
To order your list by colour, you need to add
//white,
//back and so on in between your related spells.
I know its a lot of work. Yet
I don't know another way.