[epiphany] Leave popover open on zoom step changes

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 8d95b7cd1317a40797e7163ffe091fdaf801db96
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Sun Jan 13 16:33:50 2019 +0100

    Leave popover open on zoom step changes
    
    Turn GtkModelButton into GtkButton as the former one always closes popover on activation.
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/462

 src/resources/gtk/page-menu-popover.ui | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)
---
diff --git a/src/resources/gtk/page-menu-popover.ui b/src/resources/gtk/page-menu-popover.ui
index 6dff125a0..fc7d59808 100644
--- a/src/resources/gtk/page-menu-popover.ui
+++ b/src/resources/gtk/page-menu-popover.ui
@@ -17,14 +17,16 @@
                 <class name="linked"/>
             </style>
             <child>
-              <object class="GtkModelButton">
-                <property name="text" translatable="yes">Zoom Out</property>
+              <object class="GtkButton">
                 <property name="tooltip_text" translatable="yes" context="tooltip">Zoom Out</property>
                 <property name="action-name">win.zoom-out</property>
-                <property name="iconic">True</property>
-                <property name="centered">True</property>
-                <property name="icon">zoom_out</property>
                 <property name="visible">True</property>
+                <child>
+                  <object class="GtkImage">
+                    <property name="visible">True</property>
+                    <property name="icon_name">zoom-out-symbolic</property>
+                  </object>
+                </child>
               </object>
               <packing>
                 <property name="expand">True</property>
@@ -33,13 +35,11 @@
               </packing>
             </child>
             <child>
-              <object class="GtkModelButton" id="zoom-level">
-                <property name="text">100%</property>
+              <object class="GtkButton" id="zoom-level">
+                <property name="label">100%</property>
                 <property name="tooltip_text" translatable="yes">Restore Zoom</property>
                 <property name="action-name">win.zoom-normal</property>
-                <property name="iconic">True</property>
                 <property name="xalign">0.5</property>
-                <property name="centered">True</property>
                 <property name="visible">True</property>
               </object>
               <packing>
@@ -49,14 +49,16 @@
               </packing>
             </child>
             <child>
-              <object class="GtkModelButton">
-                <property name="text" translatable="yes">Zoom In</property>
+              <object class="GtkButton">
                 <property name="tooltip_text" translatable="yes" context="tooltip">Zoom In</property>
                 <property name="action-name">win.zoom-in</property>
-                <property name="iconic">True</property>
-                <property name="centered">True</property>
-                <property name="icon">zoom_in</property>
                 <property name="visible">True</property>
+                <child>
+                  <object class="GtkImage">
+                    <property name="visible">True</property>
+                    <property name="icon_name">zoom-in-symbolic</property>
+                  </object>
+                </child>
               </object>
               <packing>
                 <property name="expand">True</property>