I see, so that's why I mentioned to create separate button, not edit current ones. It could be at the very right of the screen - undoable with peripherals, just with mouse? Then it couldn't be accidentally sold, nor I want a refund step. Or it could be limited if your cargo holds 25//50 or more of that specified cargo, you want to sell. It is just my idea of making game better for players, but also preventing some "mistake threads" or so..
As you said.. If you make a mistake.. You gotta take that and next time you'll be doing better. As it's in real life, ain't it? It's just a game and if am I right, you lose reputation when you fail mission or abandon them. Then there could be also a "undo accepting mission" button, that's just a similar case to me..
I accepted a mission yesterday without looking if any cargo is available in Colonia.. And it wasn't, so I made a mistake, and lost some rep, but I can get it back by completing any other missions.
Also, partly I can't understand how you fail mission with the sell all button. Couldn't think of any example. I'll be pleased if anyone could create some scenario or example for me.