Highlight the first choice in rescue dialog

Fixes: lp:1455970
* https://bugs.launchpad.net/kicad/+bug/1455970

eeschema/dialogs/dialog_rescue_each.cpp

@@ -135,6 +135,12 @@ void DIALOG_RESCUE_EACH::PopulateConflictList()
 
         m_ListOfConflicts->AppendItem( data );
     }
+
+    if( !m_Rescuer->m_all_candidates.empty() )
+    {
+        // Select the first choice
+        m_ListOfConflicts->SelectRow( 0 );
+    }
 }