Portrait Columns affects Landscape scaling

Issue description:

Last one, I just ran into it. Interface > Home Page > (Any)

This only affects “Grid (Landscape)” and “Grid (Landscape background)” Media Styles.

While in landscape orientation, setting the Portrait columns to “1” visibly reduces the scale of all items. Setting it back to “2” or higher restores the normal (?) scale.

Logs:

Upload description: Celorien_ColumnScaling

Additional information:

 
Pic 1: taller height used when Portrait columns is set to 2+
Pic 2: shorter height when Portrait columns is set to 1

All other settings unchanged, device is in landscape and scrolled to top for both shots.
 

Reproduction steps:

 
Device in landscape orientation, set any Home page item to Media Style “Grid (Landscape)”. Set “Columns” to “1” and the preview will show all items shrink.

“Columns (Landscape)” and “Rows” are untouched, and presumably should be the only two settings in effect for this orientation.
 

Media provider:

Local device

Screenshots: