fix: remove beforeunload and resize listener when closing composer

[steven-mpawulo]

Removed beforeunload and resize listeners

Fixes #13031

[ChristophWurst]

Thanks for the fix

[ChristophWurst]

I think this needs more refinement. The listeners have to be put back when you start composing the next email.
And saving any draft should be awaited, so the lines have to be pushed down after the if.

[steven-mpawulo]

Ohh,
Let me adjust.

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[ChristophWurst]

Tested and after sending an email I still can not reload without the warning.

Which use case does this fix address?

[steven-mpawulo]

This PR covers the case from #13031 - closing the composer without sending (draft autosaved) where the beforeunload listener wasn't being removed on close.

[ChristophWurst]

After #13303 the handling should already improve. Should be tested again.