[gtk] Adwaita: Add spacing to message dialogs

[Matthias Clasen <matthiasc src gnome org>]

commit f0c72bdc3b6f68399c593c522ca4afb0972ce410
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Apr 11 18:58:40 2019 -0400

    Adwaita: Add spacing to message dialogs
    
    The text was running into the action area.

 gtk/theme/Adwaita/_common.scss | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 44e6fde534..dfc6862606 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3853,6 +3853,10 @@ messagedialog { // Message Dialog styling
     border-top-right-radius: 7px;
   }
 
+  box.dialog-vbox.vertical {
+    border-spacing: 10px;
+  }
+
   &.csd { // rounded bottom border styling for csd version
     &.background {
       // bigger radius for better antialiasing