### Bug description

I am trying to create a Quarto PowerPoint presentation with a 2-column slide where the columns are not equal width.

I create a source document like below, but the columns are equal width in the rendered PowerPoint document.
The column width settings are respected in `revealjs` and `beamer` format documents.

```
---
title: "Untitled"
format: pptx
editor: visual
---

## Slide title

::: columns
::: {.column width="20%"}
Col 1
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
:::

::: {.column width="80%"}
Col 2
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
:::
:::
```
![Screenshot from 2022-09-28 09-53-31](https://user-images.githubusercontent.com/5409051/192657465-770a8837-f552-4bce-82d5-ab11c9054429.png)

I am using:
Quarto 1.2.160
RStudio 2022.07.2 build 576
Ubuntu 22.04.1
LibreOffice Impress 7.3.6.2 (I don't have PowerPoint on the Ubuntu PC)
PowerPoint 2007 12.0.6776.500 (issue confirmed displaying rendered PowerPoint file on a Windows PC)
cscheid
2022-09-27T23:55:29Z
rgayler
bug
v1.4
open
can't control column width in 2-column Powerpoint slide
https://github.com/quarto-dev/quarto-cli/issues/2635