Update App.xaml

CodeMaid (files-community#3632)

v1.2.2 (files-community#3496)

v1.2.0.

v1.1 (files-community#2995)

1.0 (files-community#2834)

Fixed issues found in AppCenter (files-community#2663)

Bumped version to v0.23 (files-community#2651)

Update ItemViewModel.cs

v0.21 (files-community#2452)