Fix toolbar back arrow discarding unsaved changes in File Editor #486

Job	Run time
call-pr-workflow / changes	3s
call-pr-workflow / wrapper-validation	5s
call-pr-workflow / lint	1m 54s
call-pr-workflow / detekt	34s
call-pr-workflow / test	1m 1s
call-pr-workflow / ci-gate	3s
	3m 40s

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