[115] Spread in "Retest on additional markets" gets a reset while it should be using the pairs default spread

If adding additional symbols in the "Retest on additional markets" window and checking "Turn on detailed configuration", the spreads are first shown correct and are taken from the symbols configuration in the data manager. However, if closing that window by clicking "Save" and then re-opening it, all spreads for all symbols seems to be set to "0.4" (the spread of my main symbol) instead of the relating pairs correct spread from the data manager.