Adding qandaset default label definitions

Sd1/swd1.xml

@@ -397,7 +397,7 @@
         </listitem>
       </itemizedlist>
 
-      <qandaset xml:id="sd1GrennAutoInitStartup">
+      <qandaset defaultlabel="qanda" xml:id="sd1GrennAutoInitStartup">
         <title>Automatic initialization on startup</title>
 
         <qandadiv>
@@ -451,7 +451,7 @@
         </qandadiv>
       </qandaset>
 
-      <qandaset xml:id="sd1RepresentDirections">
+      <qandaset defaultlabel="qanda" xml:id="sd1RepresentDirections">
         <title>Representation of directions</title>
 
         <qandadiv xml:id="sd1DirParameterization">
@@ -815,7 +815,7 @@
     <section xml:id="sd1CrabsEnhanceMove">
       <title>Enhancing crabs' movements</title>
 
-      <qandaset xml:id="sd1QandCrabStatesIf">
+      <qandaset defaultlabel="qanda" xml:id="sd1QandCrabStatesIf">
         <title>Adding complex behaviour</title>
 
         <qandadiv>
@@ -1045,7 +1045,7 @@
   <chapter xml:id="ideas">
     <title>Ideas</title>
 
-    <qandaset xml:id="sd1WormEatWorm">
+    <qandaset defaultlabel="qanda" xml:id="sd1WormEatWorm">
       <title>Eating multiple worms</title>
 
       <qandadiv>