Use less2 in sframe drive

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

@@ -5,6 +5,7 @@
 @import (once) "./avatar.less";
 @import (once) "./toolbar-history.less";
 @import (once) "./icon-colors.less";
+@import (once) "./tools.less";
 
 
 .toolbar_main () {
@@ -13,15 +14,6 @@
     @toolbar_top-height: 64px;
     @toolbar_button-font: @colortheme_app-font;
 
-    .unselectable () {
-        -webkit-touch-callout: none;
-        -webkit-user-select: none;
-        -khtml-user-select: none;
-        -moz-user-select: none;
-        -ms-user-select: none;
-        user-select: none;
-    }
-
     .dropdown_main();
     .ckeditor_fix();
     .history_main();
@@ -270,7 +262,7 @@
             font-family: FontAwesome;
         }
 
-        .unselectable();
+        .tools_unselectable();
 
         font: @toolbar_button-font;
         width: 100%;
@@ -289,7 +281,7 @@
 
         button {
             transition: all 0.15s;
-            .unselectable();
+            .tools_unselectable();
             &.cp-toolbar-hidden {
                 display: none;
             }