Re-Apply Fix SSE failure toast container not removed

[florian-h05]

This re-applies the fix from #2075, which must have been lost while rebasing #1987.

[relativeci]

Job #1266: Bundle Size — 15.81MiB (+0.29%).

482258f(current) vs b7270d2 main#1158(baseline)

Important

Bundle introduced 1 and removed 1 duplicate package – View changed duplicate packages

Warning

Bundle introduced 13 new packages: @jsep-plugin/regex, @jsep-plugin/arrow, @jsep-plugin/object and 10 more – View changed packages

Bundle metrics   10 changes 5 regressions 1 improvement

	Current Job #1266	Baseline Job #1158
Initial JS	1.89MiB(+13.11%)	1.67MiB
Initial CSS	609.63KiB(+0.12%)	608.89KiB
Cache Invalidation	93.81%	93.95%
Chunks	217(-0.91%)	219
Assets	683(-0.87%)	689
Modules	3027(+78.06%)	1700
Duplicate Modules	173(+92.22%)	90
Duplicate Code	1.61%(-17.44%)	1.95%
Packages	152(+10.14%)	138
Duplicate Packages	16(+6.67%)	15

Bundle size by type   3 changes 3 regressions

	Current Job #1266	Baseline Job #1158
JS	9.28MiB (+0.31%)	9.25MiB
Other	4.74MiB (+0.32%)	4.73MiB
CSS	860.87KiB (+0.16%)	859.49KiB
Fonts	526.1KiB	526.1KiB
Media	295.6KiB	295.6KiB
IMG	140.74KiB	140.74KiB
HTML	1.23KiB	1.23KiB

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View job #1266 report View florian-h05:sse-failure-toast branch activity