New icon for unpin

packages/rocketchat-message-pin/client/actionButton.coffee

@@ -21,7 +21,7 @@ Meteor.startup ->
 
 	RocketChat.MessageAction.addButton
 		id: 'unpin-message'
-		icon: 'icon-eraser'
+		icon: 'icon-pin rotate-45'
 		i18nLabel: 'Unpin_Message'
 		action: (event, instance) ->
 			message = @_arguments[1]

packages/rocketchat-message-pin/client/views/stylesheets/messagepin.less

+.icon-pin.rotate-45:before {
+	-ms-transform: rotate(45deg);
+	-webkit-transform: rotate(45deg);
+	transform: rotate(45deg);
+}
+
 .messages-box {
 	.message-cog-container {
 		.message-action {