Feature/bard songs improvements

[LegoFed3]

• Add dialog to ask whether an active song (with an active reminder AE) is meant to be used for their Opening/Sustained Effect or Final Verse
• Skip usage check for sustained/final verse songs
• Remove the auto-generated sustain reminder upon singing the final verse
• Highlight effect pertaining to the row being sung
• Add helper method to select all allies (approximated by linked tokens) in a fight, including or expluding the caster
• Add helper method to apply AE(s) to one or more tokens (bypassing permissions)
• Add song usage information to data accessible by embedded macros
• Add system macro to automate the application of Song of Heroes' opening/sustained effect, including duration and additional benefits at higher levels

Aditonally:

• Avoid displaying AE chat card for dead (not unconscious) combatants