(css) Improve autocompletion menu

UI/WebServerResources/scss/components/autocomplete/autocomplete.scss

@@ -1 +1,8 @@
 @import "extends";
+
+@media (max-width: $layout-breakpoint-sm) {
+  // Enlarge the autocompletion menu on small devices to fit the entire screen
+  .md-autocomplete-suggestions-container {
+    right: $baseline-grid*2;
+  }
+}