Add wrappers to QFileDialog -> picard.util.ui.FileDialog #1138

Job	Run time
pip-install (macos-12, 3.9)	1m 6s
pip-install (macos-12, 3.12)	1m 15s
pip-install (ubuntu-latest, 3.9)	58s
test-requirements (ubuntu-latest, 3.9, PyQt6==6.5.3 PyQt6-Qt6==6.5.3 mutagen==1.37 python-dateuti...	38s
pip-install (ubuntu-latest, 3.12)	49s
test-latest (macos-12, 3.9)	1m 40s
test-requirements (ubuntu-latest, 3.9, PyQt6>=6.5.3 mutagen~=1.37 python-dateutil~=2.7 PyYAML~=6....	41s
pip-install (windows-latest, 3.9)	1m 0s
test-latest (macos-12, 3.10)	1m 11s
test-requirements (ubuntu-latest, 3.9, PyQt6>=6.5.3 mutagen~=1.37 python-dateutil~=2.7 PyYAML~=6....	50s
test-latest (macos-12, 3.11)	1m 19s
test-requirements (ubuntu-latest, 3.9, PyQt6>=6.5.3 mutagen~=1.37 python-dateutil~=2.7 PyYAML~=6....	48s
pip-install (windows-latest, 3.12)	1m 33s
test-latest (macos-12, 3.12)	1m 23s
test-requirements (ubuntu-latest, 3.9, PyQt6>=6.5.3 mutagen~=1.37 python-dateutil~=2.7 PyYAML~=6....	32s
test-latest (ubuntu-latest, 3.9)	1m 0s
test-latest (ubuntu-latest, 3.10)	1m 6s
test-latest (ubuntu-latest, 3.11)	1m 7s
test-latest (ubuntu-latest, 3.12)	1m 7s
test-latest (windows-2019, 3.9)	1m 53s
test-latest (windows-2019, 3.10)	1m 22s
test-latest (windows-2019, 3.11)	2m 15s
test-latest (windows-2019, 3.12)	1m 52s
test-latest (macos-11, 3.9)	1m 59s
	29m 24s

Provide feedback