utils: add .text-center

scss/_utils.scss

+/* Copyright (C) 2018 Pietro Albini <pietroalbini@ubuntu.com>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+.text-center {
+    text-align: center;
+}

scss/theme.scss

@@ -24,3 +24,5 @@
 @import "navbar";
 @import "page";
 @import "footer";
+
+@import "utils";