What

• By fixing issue Can't remove single products from carousel #2603, I have discovered the summary_card file, where a single Widget contains 700 lines of code! 😱
  This is generally a bad coding behavior for Flutter, knowing how the different trees work.
• I think we should take some time to go through the code and split this kind of Widgets.
• For the first step, I suggest listing all files and they start fixing them gradually.

Part of

• Refactoring (tracker) #2528