minor bugs in pDockWidgetTitleBar and pToolButton

[andreikop]

pToolButton: You forgot to initialize mDirection, but in setDirection check, if value is changed

QSize pDockWidgetTitleBar::sizeHint() const { if ( mDock->features() & QDockWidget::DockWidgetVerticalTitleBar ) { size.rheight() += fm.width( mDock->windowTitle() ) +wis.width(); } else { size.rwidth() += fm.width( mDock->windowTitle() ) +wis.width(); } () += looks strange