Fix side condition visual glitch in replays (#2269)

This commit resets the side conditions when restarting a replay.
Without this fix, side conditions (such as Spikes) that were previously
drawn no longer show up after a restart.

Author: seanyeh

play.pokemonshowdown.com/src/battle.ts

@@ -3864,6 +3864,7 @@ export class Battle {
 		if (turn === 0) {
 			this.seeking = null;
 			this.resetStep();
+			this.scene.resetSideConditions();
 			this.scene.animationOn();
 			if (this.paused) this.subscription?.('paused');
 			return;