API.JFF: update UserAgent start value
ActiveDownloadingProgress: fix unnecessary focus of inactive form
FeedMedia: add additional buttons to the context menu
FeedSpecialCollection: 'Favorite' feed does not appear in the feeds list if it is created manually
UserCreatorForm: disable account selection when opening an empty form
MainFrame: fix background image resizing on form state changes
SettingsHost: inherit path when cloning an instance
SettingsHostCollection: Extract user path change function to static
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