QgsDecorationGridDialog: fixed the "Horizontal and Vertical" option

It was set with a lowercase v and then checked with an uppercase one:
qgsdecorationgriddialog.cpp:57:      tr( "Horizontal and vertical" ) );
qgsdecorationgriddialog.cpp:145:  else if ( text == tr( "Horizontal and Vertical" ) )

The lowercase variant is newer when you check the translation files - nobody
has it translated without also having the uppercase one too.

src/app/qgsdecorationgriddialog.cpp

@@ -54,7 +54,7 @@ QgsDecorationGridDialog::QgsDecorationGridDialog( QgsDecorationGrid& deco, QWidg
   mAnnotationDirectionComboBox->insertItem( QgsDecorationGrid::Vertical,
       tr( "Vertical" ) );
   mAnnotationDirectionComboBox->insertItem( QgsDecorationGrid::HorizontalAndVertical,
-      tr( "Horizontal and vertical" ) );
+      tr( "Horizontal and Vertical" ) );
   mAnnotationDirectionComboBox->insertItem( QgsDecorationGrid::BoundaryDirection,
       tr( "Boundary direction" ) );