modify panel header radius

resource/styles/scss/_layout_kibela.scss

@@ -38,9 +38,8 @@
     background-color: transparent;
    }
  }
-
   .panel-heading {
-    border-radius: 0.35em 0.35em 0 0 !important;
+    border-radius: 0 !important;
   }
 
  .btn-open-dropzone {