[22.01] Passing Identifier for div to Write the Chart Panel to

[assuntad23]

Fix for #16191

Moving this change to a separate PR since it should target a different release branch
See PR #16593 for additional details, relevant description copied below.

After making the other changes in that PR, I was getting a 200 response, but still was not able to view the chart, whereupon I dug around the dev console long enough to find that target was undefined, since it was misnamed as targets as a parameter. After fixing that, the boxplot renders fine. 😅

How to test the changes?

(Select all options that apply)

• Instructions for manual testing are as follows:
  1. Create a tabular file
  2. Create a boxplot visualization for it
  3. Check the visualization under Users > Visualizations
  4. Note that the graph is visible

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[mvdbeek]

Thank you @assuntad23!