Issue Summary

When the Confluence Page Viewer gadget attempts to render a Confluence page that utilizes the "Page Layout" feature (specifically sections with 2 or more columns), the gadget's dynamic height calculation fails. The iframe container expands to a default or maximum height rather than shrinking to fit the actual content, resulting in a significant amount of empty white space below the visible text. This occurs regardless of the volume of content; even a single character in a 2-column layout triggers the whitespace.

Steps to Reproduce

1. Create a page in Confluence.
2. Add a "Page Layout" section and select a Two Column (or greater) layout.
3. Add minimal text to the columns 
4. Navigate to a Jira Dashboard 
5. Add the Confluence Page Viewer gadget.
6. Configure the gadget to display the page created in Step 1.
7. Save the configuration and view the dashboard.

Expected Results

The gadget iframe should resize dynamically to fit the height of the content, leaving minimal padding/whitespace at the bottom (similar to how single-column pages render).

Actual Results

The gadget iframe retains a excessive height, displaying a large block of empty white space below the content

Workaround

Instead of using the "Page Layout" column sections, arrange the content using a standard Confluence Table or in another format. For the table:

• Insert a table with the desired number of columns.

• Remove the header row.

• Set the table borders to hidden/white.

• The gadget is able to calculate the height of Table elements correctly