some ui bug fixes

assets/sass/layout/_navigation.scss

@@ -26,10 +26,10 @@
   }
 
   &__slide-down {
-    // svg {
-    //   margin: auto;
-    //   display: block;
-    // }
+    svg {
+      margin: auto;
+      display: block;
+    }
 
     @include themify($themes) {
       background-color: themed('navbar-background-color');
@@ -188,7 +188,9 @@
       @include justify-content(center);
       @include no-select;
       @include themify($themes) {
-        color: themed('navbar-title-color');        
+        color: themed('navbar-title-color');
+        border-top: 1px solid transparent;
+        border-bottom: 1px solid themed('navbar-border-bottom-color');
         @include on-event {
           color: themed('navbar-title-hover-color');
           background-color: themed('navbar-menu-hover-background-color');

assets/sass/pages/_single.scss

@@ -540,4 +540,18 @@ li .highlight > .chroma {
   .lnt:not(:first-child) {
     padding: 0 0.3rem;
   }
+}
+
+td {
+  code {
+    padding: 2px 7px !important;
+  }
+}
+
+table:not(.lntable) {
+  td {
+    code {
+      padding: 2px 7px !important;
+    }
+  }
 }