Fix tabs in light mode

src-ui/src/app/components/split-merge/split-merge.component.scss

@@ -63,6 +63,15 @@ app-input-debounce {
   }
 }
 
+.nav-link.bg-light {
+  border-bottom-color: #f8f9fa;
+
+  &:not(.active) {
+    background-color: #fff !important;
+    border-bottom-color: #dee2e6;
+  }
+}
+
 .separator-card {
   .separator {
     border: 0;

src-ui/src/theme_dark.scss

@@ -98,8 +98,12 @@ $border-color-dark-mode: #47494f;
     .nav-link.bg-light {
       border-bottom-color: $border-color-dark-mode !important;
 
-      &:not(.active):hover {
+      &:not(.active) {
         background-color: $bg-dark-mode !important;
+
+        &:hover {
+          background-color: $bg-dark-mode !important;
+        }
       }
 
       &.active {