[geary/mjog/pref-page-icons] Components.PreferencesWindow: Add pref page icons

[Michael Gratton <mjog src gnome org>]

commit b75e251abeca22cede2954db8c97493dac4ec32c
Author: Michael Gratton <mike vee net>
Date:   Sun Apr 26 13:35:22 2020 +1000

    Components.PreferencesWindow: Add pref page icons
    
    Per advice in #813 these are required by libhandy.

 src/client/components/components-preferences-window.vala | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/client/components/components-preferences-window.vala 
b/src/client/components/components-preferences-window.vala
index e99e4ac7..17119f52 100644
--- a/src/client/components/components-preferences-window.vala
+++ b/src/client/components/components-preferences-window.vala
@@ -115,6 +115,7 @@ public class Components.PreferencesWindow : Hdy.PreferencesWindow {
         var page = new Hdy.PreferencesPage();
         /// Translators: Preferences page title
         page.title = _("Preferences");
+        page.icon_name = "preferences-other-symbolic";
         page.propagate_natural_height = true;
         page.propagate_natural_width = true;
         page.add(group);
@@ -177,6 +178,7 @@ public class Components.PreferencesWindow : Hdy.PreferencesWindow {
         var page = new Hdy.PreferencesPage();
         /// Translators: Preferences page title
         page.title = _("Plugins");
+        page.icon_name = "application-x-addon-symbolic";
         page.propagate_natural_width = true;
         page.add(group);
         page.show_all();