disable title on small reponsive screens (#1527)

assets/sass/app.scss

@@ -6,6 +6,7 @@
  */
 
 @import 'variables';
+@import 'layout';
 @import 'error-page';
 @import 'print';
 @import 'content';

assets/sass/layout.scss

@@ -0,0 +1,8 @@
+@media (max-width: $screen-sm-min) {
+    .main-header .logo {
+        display: none;
+    }
+    .fixed .content-wrapper, .fixed .right-side, .control-sidebar, .main-sidebar {
+        padding-top: 50px;
+    }
+}