[libadwaita/wip/exalm/headerbar-fix] stylesheet: Move header bar padding into an internal box

[Alexander Mikhaylenko <alexm src gnome org>]

commit 7be23ef5e2a351f6fe3ddc934147fe866bdf0e52
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Jun 11 15:46:06 2021 +0500

    stylesheet: Move header bar padding into an internal box
    
    Make sure the edges are draggable too.

 src/stylesheet/widgets/_header-bar.scss | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/src/stylesheet/widgets/_header-bar.scss b/src/stylesheet/widgets/_header-bar.scss
index 9a834c6f..9e05f0d3 100644
--- a/src/stylesheet/widgets/_header-bar.scss
+++ b/src/stylesheet/widgets/_header-bar.scss
@@ -6,7 +6,6 @@ $_header_bar_gradient: linear-gradient(to top, darken($_header_bar_color, 2%), l
 }
 
 headerbar {
-  padding: 0 6px;
   min-height: 46px;
   border-width: 0 0 1px;
   border-style: solid;
@@ -14,6 +13,8 @@ headerbar {
   background-image: $_header_bar_gradient;
 
   > windowhandle > box {
+    padding: 0 6px;
+
     &,
     > box.start,
     > box.end {
@@ -44,8 +45,11 @@ headerbar {
   }
 
   &.default-decoration {
-    min-height: 28px;
-    padding: 4px;
+    min-height: 36px;
+
+    > windowhandle > box {
+      padding: 0 4px;
+    }
 
     windowcontrols {
       button,