Fix content size calculation in portrait
Fix content size calculation in portrait

Pole-he/NVBnbCollectionView,machelix/NVBnbCollectionView,ninjaprox/Butterfly,carabina/NVBnbCollectionView,ninjaprox/NVBnbCollectionView,gaurav1981/NVBnbCollectionView,e-tipalchuk/NVBnbCollectionView,xuanyi0627/NVBnbCollectionView,mohsinalimat/NVBnbCollectionView