Fix selected item count in the properties panel

The code for updating selected item count is skipped if the properties
items don't change.


(cherry picked from commit 3f2e3d89e2)

common/widgets/properties_panel.cpp

@@ -174,6 +174,14 @@ void PROPERTIES_PANEL::rebuildProperties( const SELECTION& aSelection )
         reset();
         return;
     }
+    else if( aSelection.Size() == 1 )
+    {
+        m_caption->SetLabel( aSelection.Front()->GetFriendlyName() );
+    }
+    else
+    {
+        m_caption->SetLabel( wxString::Format( _( "%d objects selected" ), aSelection.Size() ) );
+    }
 
     // Get all the selected types
     std::set<TYPE_ID> types;
@@ -292,15 +300,6 @@ void PROPERTIES_PANEL::rebuildProperties( const SELECTION& aSelection )
         }
     }
 
-    if( aSelection.Size() > 1 )
-    {
-        m_caption->SetLabel( wxString::Format( _( "%d objects selected" ), aSelection.Size() ) );
-    }
-    else
-    {
-        m_caption->SetLabel( aSelection.Front()->GetFriendlyName() );
-    }
-
     const wxString unspecifiedGroupCaption = _( "Basic Properties" );
 
     for( const wxString& groupName : groupDisplayOrder )