ColumnView: set proper baseUrl for component
According to https://codereview.qt-project.org/c/qt/qtbase/+/530827/comment/b1384eeb_091e87d4/ QML has a bug that generates multiple dynamic metatypes with the same name. If a component doesn't have a proper baseUrl, the engine can't deduct a proper type name from the base name, hence when unregistering the metatype, something very wrong can happen because a wrong metatype can be unregistered.
BUG: 480262 FIXED-IN: 5.115