Take a look at my Display Shortcuts Extension as an example of a resizing bottom panel. I think you just need to add the "vert-resizable top-resizer" classes to your bottom-panel container.
That extension also shows how to put your HTML in a mustache template.
Take a look at my Display Shortcuts Extension as an example of a resizing bottom panel. I think you just need to add the "vert-resizable top-resizer" classes to your bottom-panel container.
That extension also shows how to put your HTML in a mustache template.