[geary/wip/3.32-avatars: 1/5] Update avatar size to be 48px, per recommendation

[Michael Gratton <mjog src gnome org>]

commit 3ebce41ac380b4b020dba0f8657678b886d42332
Author: Michael Gratton <mike vee net>
Date:   Tue Feb 26 22:53:15 2019 +1100

    Update avatar size to be 48px, per recommendation
    
    See #269

 src/client/conversation-viewer/conversation-message.vala | 13 ++++++-------
 ui/conversation-message.ui                               |  2 +-
 2 files changed, 7 insertions(+), 8 deletions(-)
---
diff --git a/src/client/conversation-viewer/conversation-message.vala 
b/src/client/conversation-viewer/conversation-message.vala
index 7d6fe7f4..9256c3b7 100644
--- a/src/client/conversation-viewer/conversation-message.vala
+++ b/src/client/conversation-viewer/conversation-message.vala
@@ -613,15 +613,14 @@ public class ConversationMessage : Gtk.Grid, Geary.BaseInterface {
             throw new GLib.IOError.CANCELLED("Conversation load cancelled");
         }
 
-        const int PIXEL_SIZE = 32;
+        // We occasionally get crashes calling as below
+        // Gtk.Image.get_pixel_size() when the image is null. There's
+        // perhaps some race going on there. So we need to hard-code
+        // the size here and keep it in sync with
+        // ui/conversation-message.ui. :(
+        const int PIXEL_SIZE = 48;
         if (this.primary_originator != null) {
             int window_scale = get_scale_factor();
-            // We occasionally get crashes calling as below
-            // Gtk.Image.get_pixel_size() when the image is
-            // null. There's perhaps some race going on there. So we
-            // need to hard-code the size and keep it in sync with
-            // ui/conversation-message.ui. :(
-            //
             //int pixel_size = this.avatar.get_pixel_size() * window_scale;
             int pixel_size = PIXEL_SIZE * window_scale;
             Gdk.Pixbuf? avatar_buf = yield loader.load(
diff --git a/ui/conversation-message.ui b/ui/conversation-message.ui
index 6f8db892..553e3cef 100644
--- a/ui/conversation-message.ui
+++ b/ui/conversation-message.ui
@@ -19,7 +19,7 @@
             <property name="visible">True</property>
             <property name="can_focus">False</property>
             <property name="valign">start</property>
-            <property name="pixel_size">32</property>
+            <property name="pixel_size">48</property>
             <property name="icon_name">avatar-default-symbolic</property>
           </object>
           <packing>