[gnome-todo/wip/christopherdavis/right-size-group] gtd-window: Add size group for stack and headerbar

[Christopher Davis <christopherdavis src gnome org>]

commit 18e3b502614d6383bcab2c604509e6d8402cbb8f
Author: Christopher Davis <brainblasted disroot org>
Date:   Thu Nov 14 11:04:04 2019 -0800

    gtd-window: Add size group for stack and headerbar
    
    This prevents an issue where the sizing between the two could get mismatched.

 src/gtd-window.ui | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/gtd-window.ui b/src/gtd-window.ui
index 5cb6247..e0be21f 100644
--- a/src/gtd-window.ui
+++ b/src/gtd-window.ui
@@ -131,6 +131,12 @@
       <widget name="start_headerbar"/>
     </widgets>
   </object>
+  <object class="GtkSizeGroup">
+    <widgets>
+      <widget name="stack"/>
+      <widget name="headerbar"/>
+    </widgets>
+  </object>
   <menu id="app-menu">
     <section>
       <item>