Add timeout when loading image dimensions for image viewer

[hjiangsu]

Pull Request Description

Review without whitespace

This PR adds a two second timeout for retrieving image dimensions on the image viewer. I've noticed that there are often times where some images don't load, or take a long time to load.

This makes it so that the image still loads if retrieving image dimensions fails (given its a proper image). The logic for retrieving image dimensions only affects the maximum zoom level, which is not a critical condition to meet. Thus, if an image fails to load their dimensions, we'll default to a max zoom level of 3.

Issue Being Fixed

Issue Number: N/A

Screenshots / Recordings

Checklist

• Did you update CHANGELOG.md?
• Did you use localized strings where applicable?
• Did you add semanticLabels where applicable for accessibility?

[micahmo]

Nice! I've noticed this issue too.

I also wonder if there's some way for us to retrieve/calculate the dimensions after the fact and adjust the zoom level then. I've noticed that the dimension loading causes all images to need to wait for two API calls (and there are even two different progress indicators, as referenced in #1082).

[hjiangsu]

I also wonder if there's some way for us to retrieve/calculate the dimensions after the fact and adjust the zoom level then.

I was also thinking about this, and was going to explore it further when we refactor the image viewer (most likely in 0.4.0)! For now, it's just a quick fix for 0.3.0 since I want to release a general build soon