Display bug: interactive_tool_pavian

I wasn't sure where to report this -- please help to route to the correct people!

The new Pavian tool is very nice! I found a small bug when attempting to sort the data columns in the viewer. Notice how a new `%` symbol is added to each column for each sorting click (up or down) or when clicking in the header at all from what I can tell. This is persistent when changing to a different tab or back again to this tab, so there isn't a way I could find to clear it out without relaunching the entire environment.

https://github.com/user-attachments/assets/5f1ca40a-e915-4c75-bf42-ed1efe793fa4

Tool id / server **Pavian** tool at UseGalaxy.eu with Google Chrome Version 137.0.7151.120 (Official Build) (arm64) using all default browser settings on MacOS 12.7.6 (didn't test the other os/browsers/servers!)

```
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> Interactive analysis of metagenomics data
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> quay.io/galaxy/pavian:0.1
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> 80
>
```

Start with the interactive_tool_pavian definition and its “Pavian visualisation” entry point, including the quay.io/galaxy/pavian:0.1 container requirement. Reproduce sorting in the viewer across tabs, then confirm that repeated clicks no longer add persistent percent symbols and test in the reported environment.

Written by the indexing model from the issue text.