Portrait/Landscape toggle is backwards for some paper sizes

[element15]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Describe the bug
For the paper sizes 16:9, 16:10, and 4:3, the canvas appears to be in a landscape orientation when Portrait is selected and vice versa.

To Reproduce

1. Create a new blank canvas
2. Change the paper size to 16:9 in the Diagram menu
3. Select the Landscape orientation
4. Notice that the canvas now appears to be in a portrait orientation

Expected behavior
The canvas is expected to be wider than it is tall when in a landscape orientation, and vice versa for a portrait orientation. This behavior appears to be working properly for all paper sizes besides 16:9, 16:10, and 4:3.

Screenshots

draw.io version (In the Help->About menu of the draw.io editor):

• 13.3.1 for macOS (installed via brew cask install drawio)
• 13.3.5 web

Desktop (please complete the following information):

• OS: macOS 10.15.3
• Browser: Firefox
• Version: 73.0.1

Smartphone (please complete the following information):
Not tested.

Additional context
None.

[mararad]

Reproduced in Win 10 and Chrome Version 83.0.4103.116 (plus Chrome Incognito) and in FF version 77.0.1 (64-bit)

[ghost]

I have the same problem. The paper size is not correctly calculated. Entering 5' x 5' sizes creates a rectangle.

used: draw.io-14.9.6-windows-installer.exe

[ezplanet]

I confirm this bug for A4 format

[alderg]

The system extends the drawing area and adds pages as needed (separated by a dashed line). However, the individual pages are of the given format and orientation. This is a feature, not a bug.