update

src/sass/gnome-shell/widgets-40-0/_dash.scss

@@ -1,4 +1,4 @@
-$dash_background_color: on($panel, track);
+$dash_background_color: on(dark, divider);
 $dash_placeholder_size: 32px;
 $dash_padding: 10px; // 10px
 $dash_spacing: 2px;
@@ -7,7 +7,7 @@ $dash_border_radius: $icon_radius + $dash_padding - $dash_spacing;
 
 #dash {
   margin-top: $base_spacing * 2;
-  padding: 0 $dash_padding;
+  padding: 0 $dash_padding - $dash_spacing;
 
   .placeholder {
     background-image:none;
@@ -29,12 +29,22 @@ $dash_border_radius: $icon_radius + $dash_padding - $dash_spacing;
 }
 
 // Dash Items
-.dash-item-container .app-well-app, .show-apps {
-  padding: $dash_padding $dash_spacing $dash_padding + $dash_bottom_margin;
+.dash-item-container {
+  margin: 0 $dash_spacing;
+
+  > * { margin: 0; }
+
+  &:first-child { margin-left: 0; }
+
+  &:last-child { margin-right: 0; }
+
+  .app-well-app, .show-apps {
+    padding: $dash_padding 0 $dash_padding + $dash_bottom_margin;
+  }
 }
 
 .dash-separator {
   width: 1px;
   margin: 0 ($dash_spacing + ($dash_padding / 2)) $dash_bottom_margin;
-  background-color: on($panel, divider);
+  background-color: on(dark, divider);
 }

src/sass/gtk/apps/_budgie.scss

@@ -26,6 +26,14 @@
   }
 }
 
+dialog.background {
+  > .dialog-vbox > scrolledwindow > viewport.frame {
+    > list {
+      border-right: 1px solid $solid-border;
+    }
+  }
+}
+
 // Budgie popover
 .budgie-popover {
   @if $rimless == 'true' {

src/sass/gtk/apps/_gnome-3.0.scss

@@ -646,6 +646,7 @@ window.background.csd {
 
 dialog.background.csd {
   > box.vertical.dialog-vbox { // wifi setting
+    > stack > notebook,
     > notebook > stack > box.horizontal > notebook > stack {
       border-radius: 0 0 $window-radius $window-radius;
     }