Memory leak in event handlers

[luithefirst]

Here is a minimal example:
https://github.com/aardvark-platform/aardvark.media/blob/main/src/Scratch/29%20-%20Garbage%20Collection/App.fs

The onClick handler closure holds temporary data that is then pinned at this line forever:

aardvark.media/src/Aardvark.UI/Updater.fs

Line 297 in b197d1b

state.handlers.[key] <- evt.serverSide