minor improvements

src/vue/charts/PCA.vue

@@ -125,7 +125,7 @@
   import getHDPICanvas from '../../utils/high-dpi-canvas'
   import StateSaver from '../mixins/state-saver'
   export default {
-    name: 'pca-analysis',
+    name: 'pca',
     data () {
       return {
         height: 0,

src/vue/charts/Volcanoplot.vue

@@ -403,6 +403,7 @@
         td, tr
             border: none
         tr
+            margin: 0
             &:hover:not(#table-colnames)
                 background: #ff6c6c
 </style>