Fix mindplot public view issue

wise-webapp/src/main/webapp/css/css/skin.less

@@ -1,3 +0,0 @@
-@header-height: 75px;
-@header-toolbar-height: 35px;
-@header-info-height: @header-height - @header-toolbar-height;

wise-webapp/src/main/webapp/css/embedded.less

@@ -38,13 +38,13 @@ div#footerLogo {
 }
 
 div#zoomIn {
-    background: url(../images/zoom-in.png) no-repeat left top;
+    background: url(../../images/zoom-in.png) no-repeat left top;
     margin-top: 10px;
     margin-left: 10px;
 }
 
 #zoomOut {
-    background: url(../images/zoom-out.png) no-repeat left top;
+    background: url(../../images/zoom-out.png) no-repeat left top;
     margin-top: 10px;
     margin-left: 5px;
 }