Fix small UI issues and IE issues

www/pad/app-pad.less

@@ -13,7 +13,6 @@
     #cke_1_top {
         overflow: visible;
         padding: 0px;
-        display: flex;
     }
     .cke_toolbox_main {
         background-color: @colortheme_pad-toolbar-bg;
@@ -23,10 +22,7 @@
         }
     }
     .cke_wysiwyg_frame {
-        min-width: 60%;
-    }
-    #cke_1_toolbox {
-        flex: 1;
+        width: 100%;
     }
     #cke_editor1 {
         display: flex;

www/pad/inner.js

@@ -629,7 +629,6 @@ define([
                         'max-width: 50em; padding: 20px 30px; margin: 0 auto; min-height: 100%;'+
                         'box-sizing: border-box; overflow: auto;'+
                     '}' +
-                    'html.cke_body_width { overflow: hidden; }' +
                     '.cke_body_width body > *:first-child { margin-top: 0; }';
                 Ckeditor.addCss(newCss);
                 Ckeditor.plugins.addExternal('mediatag','/pad/', 'mediatag-plugin.js');