Support re-rolling the number of attacks

[dixhuit]

Under the "Re-roll" effect I'd need to add an "Attacks" option to the "Application" select list. I'd also need to only allow "Result range" as an option in the "Result to re-roll" select list (might as well preselect it in this case).

[dixhuit]

Eldar have the ability to re-roll 1 failed hit roll and 1 failed wound roll. Always. But then you have units like the Fie Prism that also has a rule to allow it to re-roll one failed hit and one failed wound roll. So you re-roll 2 dice for hit and wound.

This is a completely separate issue. This issue is just about re-rolling attacks.