优化安装程序

web/views/@default/setup/@install.less

@@ -63,6 +63,20 @@
 		z-index: 1;
 		width: @width;
 		bottom: 1em;
+
+		button {
+			z-index: 10;
+		}
+
+		.status-box {
+			position: absolute;
+			top: 3em;
+			left: 15em;
+			right: 15em;
+			bottom: 0;
+			text-align: center;
+			z-index: 0;
+		}
 	}
 }