Zone objective abstraction, cleanup

core/assets/bundles/bundle.properties

@@ -391,8 +391,9 @@ donate = Donate
 abandon = Abandon
 abandon.text = This zone and all its resources will be lost to the enemy.
 locked = Locked
-complete = [lightgray]Reach:
-zone.requirement = Wave {0} in zone {1}
+complete = [lightgray]Complete:
+zone.requirement.wave = Wave {0} in {1}
+zone.requirement = Destroy core: {0}
 resume = Resume Zone:\n[lightgray]{0}
 bestwave = [lightgray]Best Wave: {0}
 launch = < LAUNCH >
@@ -406,7 +407,7 @@ configure = Configure Loadout
 configure.locked = [lightgray]Unlock configuring loadout: Wave {0}.
 configure.invalid = Amount must be a number between 0 and {0}.
 zone.unlocked = [lightgray]{0} unlocked.
-zone.requirement.complete = Wave {0} reached:\n{1} zone requirements met.
+zone.requirements.met = {0}: zone requirements met.
 zone.config.complete = Wave {0} reached:\nLoadout config unlocked.
 zone.resources = [lightgray]Resources Detected:
 zone.objective = [lightgray]Objective: [accent]{0}