Add an explanatory description to the CurrentSuccessRatio result

[abeham]

As reported by swinkler

• IMHO the meaning of the result "CurrentSuccessRatio?" is not completely clear, especially because there is no description given. This value rises steadily during a generation of an OS-GA; from the publications one could expect this parameter to be either constant (because it is a parameter of the OS) or fluctuating (because it represents something like the "success rate").
  • abeham: It's an indication of how much of the currently generated offspring population in the OS step is successful compared to the total population. It's not a result as such, but rather a live status feedback. If it's causing confusion I'll remove it, but I'll have to talk to maffenze about this first.
  • swagner: This parameter is quite valuable and should not be removed. I also would not change the name, but perhaps we can add an explanatory description?

[abeham]

r6630

• Added description

[abeham]

r6631

• Changed Result's ItemDescription to display its Description if one is defined, otherwise the description was not visible

[swagner]

Thanks for adding the descriptions. I reviewed the changes and made some additional modifications in r7235:

• added information icons in VariableValueView and ResultValueView for showing the description of a variable or a result
• fixed tooltip update in NamedItemCollectionView
• reverted changes of r6631 as the item tooltips are now correctly updated with Item.Description
• removed some outdated XML source code comments