Merge branch 'revise_cleansing_flames' into 'master'

Revise Cleansing Flames

1. makes it instant to compensate the loss of passive mode, and the opportunity to remove several debuffs per turn;
2. rewrite the formula of cleanse chance each turn, to use actual talent level instead of raw level and reduce the cleanse chance beyond player's talent level;
3. makes it dealing as much damage as the description says, currently it deals a fixed 10 damage. 

If this is rejected, then the part 3 might need a standalone fix.

See merge request !780