Fixed BreakoutRoomSettings style.

bigbluebutton-client/branding/default/style/css/BBBDefault.css

@@ -912,6 +912,5 @@ EmojiGrid {
 }
 
 .breakoutTipBox {
-	backgroundColor: 0xCCCCCC;
 	horizontalAlign: center;
 }

bigbluebutton-client/src/org/bigbluebutton/modules/users/views/BreakoutRoomSettings.mxml

@@ -127,7 +127,7 @@ with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 		<mx:Tile id="roomsContainer" width="100%" height="100%"
 				 paddingTop="20" paddingBottom="20"/>
 			
-		<mx:Box width="100%" styleName="breakoutTipBox">
+		<mx:Box width="100%" styleName="breakoutTipBox" backgroundColor="0xcccccc">
 			<mx:Text text="{ResourceUtil.getInstance().getString('bbb.users.breakout.dragAndDropToolTip')}"/>
 		</mx:Box>