Adjust confirmation dialog event response

[Blackbaud-SteveBrush]

The result of the dialog returns the text of the button clicked instead of some hard-coded string literal you specify. This makes sense on the surface, but when you throw localization into the mix, you'll find that the predefined Yes, No, and Cancel buttons will be localized so you'll have to compare against a localized string of those values which exist within SKY UX's resource files. This means for the normal case, you'll have to have your own resource strings for Yes, No, and/or Cancel, grab that value from the resources service, then use it to compare against the result instead of the ideal scenario where you'd just compare against a hard-coded value like 'yes'. Changing this would be considered breaking changes.