[gthumb] Support keyboard navigation in the Tags dialog

[Paolo Bacchilega <paobac src gnome org>]

commit aaee84ff501d534e88c4aa567d372de41ea93981
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Fri Oct 27 18:52:20 2017 +0200

    Support keyboard navigation in the Tags dialog
    
    [bug #777234]

 extensions/edit_metadata/data/ui/tag-chooser.ui |    9 ++++++---
 gthumb/gth-tags-entry.c                         |    1 -
 2 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/extensions/edit_metadata/data/ui/tag-chooser.ui b/extensions/edit_metadata/data/ui/tag-chooser.ui
index 7009c68..6f007f7 100644
--- a/extensions/edit_metadata/data/ui/tag-chooser.ui
+++ b/extensions/edit_metadata/data/ui/tag-chooser.ui
@@ -1,15 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.20.1 -->
 <interface>
-  <requires lib="gtk+" version="2.14"/>
-  <object class="GtkVBox" id="content">
+  <requires lib="gtk+" version="3.16"/>
+  <object class="GtkBox" id="content">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
+    <property name="orientation">vertical</property>
     <property name="spacing">6</property>
     <child>
       <object class="GtkLabel" id="tag_label">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="xalign">0</property>
+        <property name="halign">start</property>
+        <property name="hexpand">True</property>
         <property name="label" translatable="yes">T_ags:</property>
         <property name="use_underline">True</property>
       </object>
diff --git a/gthumb/gth-tags-entry.c b/gthumb/gth-tags-entry.c
index a47be82..034f711 100644
--- a/gthumb/gth-tags-entry.c
+++ b/gthumb/gth-tags-entry.c
@@ -1078,7 +1078,6 @@ gth_tags_entry_init (GthTagsEntry *self)
        GtkCellRenderer   *renderer;
        GtkWidget         *menu_item;
 
-       gtk_widget_set_can_focus (GTK_WIDGET (self), TRUE);
        gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (self)), 
GTK_STYLE_CLASS_COMBOBOX_ENTRY);
        gtk_orientable_set_orientation (GTK_ORIENTABLE (self), GTK_ORIENTATION_VERTICAL);
        gtk_box_set_spacing (GTK_BOX (self), 3);