[Development] Qt Installer Framework to allow only Updates

[Juan Navarro]

I am attempting to create an updater tool for my already installed
application in a locked-down system. The Maintenance tool from the Qt
Installer Framework seems perfect, with its integration with remote
repositories, but I would need to remove the "Add" and "Remove" components
options, leaving only the "Update" option.

I already tried in the Controller:
    installer.removeWizardPageItem(component, "UninstallerRadioButton")
and
    gui.pageById(QInstaller.Introduction).UninstallerRadioButton.hide()
with no success :-(

However,
    gui.pageById(QInstaller.Introduction).MessageLabel.hide()
DOES work!

Is there any way to remove those radio buttons by using scripting?
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