Property activePage is reset by src or content in PDFViewer while in initializing

Steps to Reproduce

<zk>
    <pdfviewer activePage="1" src="example.pdf" width="100%" height="400px"/>
</zk>

Current Result

It loads page 1 initially (activePage 0)

Expected Result

It loads page 2 initially (activePage 1)

Debug Information

Both calling setSrc and setContent resets the activePage to 0.
It is okay if the loaded PDF is changed dynamically.
But for initial properties, it shouldn't be reset.

Workaround

Call setActivePage at the end

<pdfviewer src="example.pdf" activePage="1" width="100%" height="400px"/>