Online installer leaves documentation/examples behind when uninstalling a version of Qt

Context
My current "instance" of Qt has existed since July 2015. Through this instance, I've previously installed and then uninstalled Qt 5.5, Qt 5.7, and 5.8.

Issues
Even though I uninstalled Qt 5.5, 5.7, and 5.8, all their documentation and examples were left behind.

Furthermore, because I had installed Qt 5.7.0 but not 5.7.1, the "Update components" option in MaintenanceTool.exe still prompts me to update the Qt 5.7 docs/examples (even though I have no 5.7 binaries anymore)
 

Workaround
From http://lists.qt-project.org/pipermail/interest/2017-June/027381.html : Launch MaintenanceTool with the --show-virtual-components argument and manually uninstall the documentation/examples