[popup] display is shifted when `zoom` CSS property is used

# Bug Report I like the global appearance of Fomantic a little bit bigger. As it is not possible to do it natively, I use the `zoom` css property: ```css html { zoom: 1.2; } ``` This cause a display issue for popup titles. Everything is shifted to the right and to the bottom: ```js $('*[title]').popup(); ``` ## Testcase https://jsfiddle.net/3pm02h9y/ ## Screenshot (if possible) Here, the mouse is over the refresh button but the popup is displayed far away: <img width="1806" height="306" alt="Image" src="https://github.com/user-attachments/assets/63370c0a-6ba8-4a37-b5e2-5edeaddcd2a9" /> ## Version 2.9.4