Base PollButtons on TileGroup instead of HGroup.

clients/flash/air-client/src/org/bigbluebutton/air/main/views/MainView.as

@@ -65,7 +65,7 @@ package org.bigbluebutton.air.main.views {
 			
 			_webcamDock.bottom = _menuButtons.height;
 			
-			_pollButton.bottom = _menuButtons.height + getStyle("pollPadding");;
+			_pollButton.bottom = getStyle("pollPadding");;
 		}
 	}
 }

clients/flash/air-client/src/org/bigbluebutton/air/poll/views/PollButtons.as

 package org.bigbluebutton.air.poll.views {
 	import spark.components.Button;
-	import spark.components.HGroup;
+	import spark.components.TileGroup;
+	import spark.layouts.ColumnAlign;
 	
 	import org.bigbluebutton.air.poll.models.PollVO;
 	
-	public class PollButtons extends HGroup {
+	public class PollButtons extends TileGroup {
+		public function PollButtons() {
+			columnAlign = ColumnAlign.JUSTIFY_USING_GAP;
+		}
+		
 		public function addButtons(poll:PollVO):void {
 			var voteBtn:Button;
 			var numBtns:int = poll.answers.length;
@@ -12,7 +17,6 @@ package org.bigbluebutton.air.poll.views {
 			for (var i:int = 0; i < numBtns; i++) {
 				voteBtn = new Button();
 				voteBtn.percentWidth = btnWidth;
-				voteBtn.height = 70;
 				voteBtn.styleName = "voteButton";
 				// To be localised
 				voteBtn.label = poll.answers[i].key;
@@ -24,7 +28,6 @@ package org.bigbluebutton.air.poll.views {
 		
 		override protected function updateDisplayList(w:Number, h:Number):void {
 			super.updateDisplayList(w, h);
-			this.gap = getStyle("gap");
 			this.padding = getStyle("padding");
 		}
 	}