Issue loading SVG for certain question types

[rtibbles]

When previewing the answers while making a quiz I noticed that in "Make bar graphs" some of the bar graphs are not loading. This one is extant in Kolibri 0.17.5 and is therefore not caused by changes made here, but I'm just mentioning it.:

https://github.com/user-attachments/assets/56c43db0-3106-46e1-b8d8-3b021fb17ac5

This is also the case when viewing the quiz as a Learner:

Originally posted by @pcenov in https://github.com/learningequality/kolibri/issues/13136#issuecomment-2701243235

[rtibbles]

Hrm, after a little more investigation, I suspect this is actually another instance of https://github.com/learningequality/kolibri-library/issues/20 - I'll keep this open until https://github.com/learningequality/kolibri-library/issues/20 is resolved so we can confirm or deny the fix.