gui: add option to delete wallet #1592

Job	Run time
linter_gui	2m 32s
linter	36s
unit_tests (1.54, ubuntu-latest)	2m 3s
unit_tests (1.54, macOS-latest)	2m 51s
unit_tests (1.54, windows-latest)	2m 53s
unit_tests (nightly, ubuntu-latest)	51s
unit_tests (nightly, macOS-latest)	1m 21s
unit_tests (nightly, windows-latest)	1m 43s
unit_tests_gui (1.65, ubuntu-latest)	3m 42s
unit_tests_gui (1.65, macOS-latest)	5m 0s
unit_tests_gui (1.65, windows-latest)	5m 55s
unit_tests_gui (nightly, ubuntu-latest)	2m 40s
unit_tests_gui (nightly, macOS-latest)	7m 32s
unit_tests_gui (nightly, windows-latest)	4m 33s
	44m 12s

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