UI: install - new version

public/less/_base.less

@@ -66,6 +66,13 @@ footer {
 .hide {
 	display: none;
 }
+.center {
+	text-align: center;
+}
+
+.text-error {
+	color: #d95c5c !important;
+}
 
 .generate-img(16);
 .generate-img(@n, @i: 1) when (@i =< @n) {

public/less/_install.less

@@ -17,6 +17,17 @@
 			.help {
 				margin-left: 41%;
 			}
+			&.optional .title {
+				margin-left: 38%;
+			}
+		}
+	}
+	.ui {
+		.checkbox {
+			margin-left: 40% !important;
+			label {
+				width: auto !important;
+			}
 		}
 	}
 }