[gnome-maps] help-overlay: Restrict height to force two columns

[Marcus Lundblad <mlundblad src gnome org>]

commit 44b8e2b58d712c74ec5f9bf64d294e8d4c5b89e4
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Feb 19 21:40:44 2018 +0100

    help-overlay: Restrict height to force two columns
    
    https://bugzilla.gnome.org/show_bug.cgi?id=793614

 data/ui/help-overlay.ui |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/help-overlay.ui b/data/ui/help-overlay.ui
index 9df7db4..b9e9260 100644
--- a/data/ui/help-overlay.ui
+++ b/data/ui/help-overlay.ui
@@ -5,6 +5,9 @@
     <child>
       <object class="GtkShortcutsSection">
         <property name="visible">1</property>
+        <!-- The longer shortcut titles make GTK+ want to layout the groups
+             vertically, but we really really want a horizontal layout -->
+        <property name="max-height">10</property>
         <child>
           <object class="GtkShortcutsGroup">
             <property name="visible">1</property>