refactor(UI): minor UI improvements

src/renderer/scss/main.scss

@@ -138,6 +138,7 @@ body {
 
     .tab-link {
       min-width: 0;
+      transition: color 0.2s;
     }
 
     &.active {
@@ -237,3 +238,23 @@ body {
     visibility: hidden;
   }
 }
+
+.table-dropdown {
+  .menu {
+    min-width: 100%;
+    padding: 0;
+
+    .menu-item {
+      padding: 0;
+
+      > a {
+        margin: 0.2rem;
+        padding: 0.1rem 0.3rem;
+
+        &:hover {
+          color: inherit;
+        }
+      }
+    }
+  }
+}

src/renderer/scss/themes/dark-theme.scss

@@ -266,7 +266,7 @@
   }
 
   .editor-col {
-    border-left: 2px solid $bg-color-light-dark;
+    border-left: 0.05rem solid rgba($bg-color-light-dark, 60%);
   }
 
   .table {

src/renderer/scss/themes/light-theme.scss

@@ -98,7 +98,7 @@
   }
 
   .editor-col {
-    border-left: 2px solid darken($bg-color-light-gray, 15%);
+    border-left: 0.05rem solid darken($bg-color-light-gray, 15%);
   }
 
   .file-uploader {