Make ice dude show up (#2200)

* Make ice dude show up

* replace contains with equals

Might as well fix this while I'm here.
"leave" and "enter" have the same number of letters, so it works.

* empty strings suck

* Update SceneTrigger.java

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Co-authored-by: Magix <27646710+KingRainbow44@users.noreply.github.com>

src/main/java/emu/grasscutter/scripts/data/SceneTrigger.java

@@ -27,7 +27,7 @@ public final class SceneTrigger {
 
     @Override
     public int hashCode() {
-        return name.hashCode();
+        return (currentGroup.id + name).hashCode();
     }
 
     @Override