Embedded Rerun web viewer loses track of drag events

[martenbjork]

Describe the annoyance
When using an embedded Rerun window, drag events are only tracked inside the window frame, not outside. As a result, Rerun tends to loose track of drags halfway through. Example:

• Start a drag (resize a panel)
• Accidentally drag outside
• Resizing stops
• As a result, I think something has gone wrong and up stop the drag
• I put the cursor inside the embed to start over
• Rerun thinks a drag is still ongoing because it didn't track the onmouseup event outside the window

To Reproduce
Repeat the steps above using the Rerun embed here:

https://huggingface.co/spaces/pablovela5620/mini-dust3r

Expected behavior

Drags should work even when the drag is outside the window. Like this:

dragging-outside.mov

Desktop (please complete the following information):

• OS: MacOS 14.4.1, Chrome 118.0.5993.70

[emilk]

egui issue:

• Web demo loses mouse cursor position when dragging off the window emilk/egui#3157

[emilk]

• Fix coming in Fix: still track mouse when dragging outside web canvas emilk/egui#4522