Use less2 in secure iframes

customize.dist/src/less2/include/dropdown.less

@@ -0,0 +1,109 @@
+@import (once) "./colortheme.less";
+
+/* The container <div> - needed to position the dropdown content */
+.dropdown_main () {
+    .cp-dropdown-container {
+        @dropdown_font: @colortheme_app-font-size @colortheme_font;
+        position: relative;
+        display: inline-block;
+
+        .fa {
+            font-family: FontAwesome;
+        }
+
+        button {
+            .fa-caret-down{
+                margin-right: 0px;
+                margin-left: 5px;
+            }
+            * {
+                .unselectable();
+                cursor: default;
+            }
+        }
+
+        .cp-dropdown-content {
+            display: none;
+            position: absolute;
+            background-color: @colortheme_dropdown-bg;
+            min-width: 250px;
+            box-shadow: 0px 1px 5px 0px rgba(0, 0, 0, 0.2);
+            z-index: 1000;
+            max-height: 300px;
+            overflow-y: auto;
+            font: @dropdown_font;
+            line-height: 1em;
+
+            &.cp-dropdown-left {
+                right: 0;
+            }
+
+            &:hover {
+                display: block;
+            }
+
+            a {
+                color: @colortheme_dropdown-color;
+                padding: 5px 16px;
+                text-decoration: none;
+                display: flex;
+                cursor: pointer;
+                -webkit-user-select: none;
+                -moz-user-select: none;
+                -ms-user-select: none;
+                user-select: none;
+                float: none;
+                text-align: left;
+                font: @dropdown_font;
+                line-height: 1em;
+
+
+                .fa {
+                    width: 20px;
+                    text-align: center;
+                    margin-right: 5px !important;
+                }
+
+                &:hover {
+                    background-color: @colortheme_dropdown-bg-hover;
+                    color: @colortheme_dropdown-color;
+                }
+
+                &.cp-dropdown-element-active {
+                    background-color: @colortheme_dropdown-bg-active;
+                    color: @colortheme_dropdown-color;
+                }
+            }
+
+            hr {
+                margin: 5px 0px;
+                height: 1px;
+                background: #bbb;
+            }
+
+            p {
+                min-width: 160px;
+                padding: 5px;
+                margin: 0;
+                white-space: normal;
+                text-align: left;
+                color: black;
+                font-size: 14px;
+                * {
+                    font-size: 14px;
+                }
+                h2 {
+                    color: black;
+                    font-weight: bold;
+                    text-align: center;
+                    background-color: #EEEEEE;
+                    padding: 5px 0px;
+                    margin: 5px 0px;
+                    font-size: 16px;
+                    white-space: normal;
+                }
+            }
+        }
+    }
+}
+