Mint-Y: Fix seahorse/libhandy headerbars when multiple are used.

Author: mtwebster

src/Mint-Y/gtk-3.0/gtk-dark.css

@@ -4086,3 +4086,9 @@ window.csd.unified:not(.solid-csd):not(.fullscreen):not(.tiled):not(.tiled-top):
 .windowhandle separator.sidebar:dir(ltr), .windowhandle separator.sidebar.left, .windowhandle separator.sidebar.left:dir(rtl), .windowhandle separator.sidebar:dir(rtl), .windowhandle separator.sidebar.right {
   background-color: #212121;
   margin: 0; }
+
+hdyleaflet:last-child headerbar {
+  border-top-right-radius: 8px; }
+
+hdyleaflet:first-child headerbar {
+  border-top-left-radius: 8px; }

src/Mint-Y/gtk-3.0/gtk.css

@@ -4103,3 +4103,9 @@ window.csd.unified:not(.solid-csd):not(.fullscreen):not(.tiled):not(.tiled-top):
 .windowhandle separator.sidebar:dir(ltr), .windowhandle separator.sidebar.left, .windowhandle separator.sidebar.left:dir(rtl), .windowhandle separator.sidebar:dir(rtl), .windowhandle separator.sidebar.right {
   background-color: #BDBDBD;
   margin: 0; }
+
+hdyleaflet:last-child headerbar {
+  border-top-right-radius: 8px; }
+
+hdyleaflet:first-child headerbar {
+  border-top-left-radius: 8px; }

src/Mint-Y/gtk-3.0/sass/_libhandy.scss

@@ -236,3 +236,12 @@ window.csd.unified:not(.solid-csd):not(.fullscreen):not(.tiled):not(.tiled-top):
     margin: 0;
   }
 }
+
+hdyleaflet {
+  &:last-child headerbar {
+    border-top-right-radius: 8px;
+  }
+  &:first-child headerbar {
+    border-top-left-radius: 8px;
+  }
+}