dialer: Descend from GtkBin directly

Makes HdyDialer descend from GtkBin directly rather than from
GtkEventBox. GtkEventBox will be dropped in GTK+ 4 and brings no
functionality to HdyDialer.

src/hdy-dialer.c

@@ -32,7 +32,7 @@ typedef struct
   GtkReliefStyle relief;
 } HdyDialerPrivate;
 
-G_DEFINE_TYPE_WITH_PRIVATE (HdyDialer, hdy_dialer, GTK_TYPE_EVENT_BOX)
+G_DEFINE_TYPE_WITH_PRIVATE (HdyDialer, hdy_dialer, GTK_TYPE_BIN)
 
 enum {
   PROP_0,

src/hdy-dialer.h

@@ -17,7 +17,7 @@ G_BEGIN_DECLS
 
 #define HDY_TYPE_DIALER (hdy_dialer_get_type())
 
-G_DECLARE_DERIVABLE_TYPE (HdyDialer, hdy_dialer, HDY, DIALER, GtkEventBox)
+G_DECLARE_DERIVABLE_TYPE (HdyDialer, hdy_dialer, HDY, DIALER, GtkBin)
 
 /**
  * HdyDialerClass:
@@ -26,7 +26,7 @@ G_DECLARE_DERIVABLE_TYPE (HdyDialer, hdy_dialer, HDY, DIALER, GtkEventBox)
  */
 struct _HdyDialerClass
 {
-  GtkEventBoxClass parent_class;
+  GtkBinClass parent_class;
 
   /* Signals
    */

src/hdy-dialer.ui

@@ -2,10 +2,8 @@
 <!-- Generated with glade 3.22.1 -->
 <interface>
   <requires lib="gtk+" version="3.20"/>
-  <template class="HdyDialer" parent="GtkEventBox">
+  <template class="HdyDialer" parent="GtkBin">
     <property name="can_focus">False</property>
-    <property name="visible_window">False</property>
-    <property name="above_child">False</property>
     <child>
       <object class="GtkGrid" id="grid">
         <property name="can_focus">False</property>