[gimp] Improve pixel format choice UI in PNG exporting options

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 27aa87ba8ece71fcd3ead17b69ffaa525691e56d
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Fri Dec 7 12:25:02 2018 +0300

    Improve pixel format choice UI in PNG exporting options
    
    The former UI did not conform to what we do elsewhere.
    Use label + combo now.

 plug-ins/ui/plug-in-file-png.ui | 58 +++++++++++++++++++++++++----------------
 1 file changed, 36 insertions(+), 22 deletions(-)
---
diff --git a/plug-ins/ui/plug-in-file-png.ui b/plug-ins/ui/plug-in-file-png.ui
index 6a5fecce4e..3d33509b13 100644
--- a/plug-ins/ui/plug-in-file-png.ui
+++ b/plug-ins/ui/plug-in-file-png.ui
@@ -222,28 +222,6 @@
         <property name="width">4</property>
       </packing>
     </child>
-    <child>
-      <object class="GtkComboBoxText" id="pixelformat-combo">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <items>
-          <item translatable="yes">automatic pixelformat</item>
-          <item translatable="yes">8bpc RGB</item>
-          <item translatable="yes">8bpc GRAY</item>
-          <item translatable="yes">8bpc RGBA</item>
-          <item translatable="yes">8bpc GRAYA</item>
-          <item translatable="yes">16bpc RGB</item>
-          <item translatable="yes">16bpc GRAY</item>
-          <item translatable="yes">16bpc RGBA</item>
-          <item translatable="yes">16bpc GRAYA</item>
-        </items>
-      </object>
-      <packing>
-        <property name="left_attach">0</property>
-        <property name="top_attach">7</property>
-        <property name="width">4</property>
-      </packing>
-    </child>
     <child>
       <object class="GtkLabel" id="compression-level-label">
         <property name="visible">True</property>
@@ -331,5 +309,41 @@
         <property name="width">4</property>
       </packing>
     </child>
+    <child>
+      <object class="GtkComboBoxText" id="pixelformat-combo">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <items>
+          <item translatable="yes">Automatic</item>
+          <item translatable="yes">8bpc RGB</item>
+          <item translatable="yes">8bpc GRAY</item>
+          <item translatable="yes">8bpc RGBA</item>
+          <item translatable="yes">8bpc GRAYA</item>
+          <item translatable="yes">16bpc RGB</item>
+          <item translatable="yes">16bpc GRAY</item>
+          <item translatable="yes">16bpc RGBA</item>
+          <item translatable="yes">16bpc GRAYA</item>
+        </items>
+      </object>
+      <packing>
+        <property name="left_attach">1</property>
+        <property name="top_attach">7</property>
+        <property name="width">3</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkLabel" id="pixelformat-label">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="halign">start</property>
+        <property name="label" translatable="yes">_Pixel format:</property>
+        <property name="use_underline">True</property>
+        <property name="xalign">0</property>
+      </object>
+      <packing>
+        <property name="left_attach">0</property>
+        <property name="top_attach">7</property>
+      </packing>
+    </child>
   </object>
 </interface>