Bug 1710533 - Apply the widget size constraints to newBounds r=mstange,gfx-reviewers

When nsView::CalcWidgetBounds() size might be applied to widget with modification. And next widget->GetClientBounds() could be different than nsView::CalcWidgetBounds() again with several reasons. But it seems OK to apply widget->ConstrainSize() in nsView::DoResetWidgetBounds(). It could remove repaint because of widget->ConstrainSize() call in the Resize().

Differential Revision: https://phabricator.services.mozilla.com/D114814