fix: fix bug preventing editing of apps with no icon image set #193

Job	Run time
Package CLI	6m 55s
Release	51s
Functional Tests (windows-latest)	1m 39s
Functional Tests (ubuntu-latest)	27s
Functional Tests (macos-latest)	1m 0s
Create Github Release	0s
Bump Homebrew Formula	0s
Release Windows Installer	0s
	10m 52s

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