feat: enable folders by default and remove from experimental features

app/assets/stylesheets/_navigation.scss

@@ -5,6 +5,8 @@
   height: 100%;
 }
 
+$content-horizontal-padding: 16px;
+
 #navigation {
   user-select: none;
   -moz-user-select: none;
@@ -20,15 +22,15 @@
 
   .section-title-bar {
     color: var(--sn-stylekit-secondary-foreground-color);
-    padding-top: 15px;
+    padding-top: 0.8125rem;
     padding-bottom: 8px;
-    padding-left: 14px;
-    padding-right: 14px;
+    padding-left: $content-horizontal-padding;
+    padding-right: $content-horizontal-padding;
     font-size: 12px;
   }
 
   .no-tags-placeholder {
-    padding: 0px 14px;
+    padding: 0px $content-horizontal-padding;
     font-size: 12px;
     opacity: 0.4;
     margin-top: -5px;

app/assets/stylesheets/_notes.scss

@@ -25,6 +25,10 @@
     flex-direction: column;
   }
 
+  #notes-title-bar-container {
+    padding: 0.8125rem;
+  }
+
   #notes-title-bar {
     font-weight: normal;
     overflow: visible;
@@ -149,7 +153,7 @@
       }
 
       .flag-icons {
-        padding: .135rem 0;
+        padding: 0.135rem 0;
 
         &,
         & > * {