Fix buttons in the layers docker

(hope noone had time to notice they were broken :) )

krita/krita.action

@@ -2427,7 +2427,7 @@
       <statusTip></statusTip>
     </Action>
     <Action name="duplicatelayer">
-      <icon>edit-copy</icon>
+      <icon>duplicatelayer</icon>
       <text>&amp;Duplicate Layer or Mask</text>
       <whatsThis></whatsThis>
       <toolTip>Duplicate Layer or Mask</toolTip>
@@ -3088,7 +3088,7 @@
       <statusTip></statusTip>
     </Action>
     <Action name="move_layer_up">
-      <icon></icon>
+      <icon>arrowupblr</icon>
       <text>Move Layer or Mask Up</text>
       <whatsThis></whatsThis>
       <toolTip>Move Layer or Mask Up</toolTip>
@@ -3099,7 +3099,7 @@
       <statusTip></statusTip>
     </Action>
     <Action name="move_layer_down">
-      <icon></icon>
+      <icon>arrowdown</icon>
       <text>Move Layer or Mask down</text>
       <whatsThis></whatsThis>
       <toolTip>Move Layer or Mask Down</toolTip>

krita/plugins/extensions/dockers/defaultdockers/sync_button_and_action.h

@@ -33,6 +33,9 @@ public:
           m_button(button)
     {
         connect(m_action, SIGNAL(changed()), SLOT(slotActionChanged()));
+        connect(m_button, SIGNAL(clicked()), m_action, SLOT(trigger()));
+        m_button->setIcon(m_action->icon());
+        m_button->setText(m_action->text());
     }
 
 private Q_SLOTS: