Add new mixin, and added mixins to stylesheet.css

public/less/mixins.less

@@ -51,4 +51,22 @@
 	overflow: hidden;
 	text-overflow: ellipsis;
 	white-space: nowrap;
+}
+
+.fix-lists {
+	ul {
+		> li {
+			list-style-type: disc;
+
+			ul > li {
+				list-style-type: circle;
+
+				ul > li {
+					list-style-type: square;
+				}
+			}
+		}
+
+		margin-bottom: 10px;
+	}
 }

src/meta/css.js

@@ -69,6 +69,7 @@ module.exports = function(Meta) {
 				source += '\n@import (inline) "..' + path.sep + '..' + path.sep + 'public/vendor/jquery/textcomplete/jquery.textcomplete.css";';
 				source += '\n@import (inline) "..' + path.sep + '..' + path.sep + 'public/vendor/colorpicker/colorpicker.css";';
 				source += '\n@import "..' + path.sep + '..' + path.sep + 'public/less/generics.less";';
+				source += '\n@import "..' + path.sep + '..' + path.sep + 'public/less/mixins.less";';
 
 				var acpSource = '\n@import "..' + path.sep + 'public/less/admin/admin";\n' + source;
 				acpSource += '\n@import "..' + path.sep + 'public/less/generics.less";';