Cannot uninstall a plugin if there is no internet connection

[LesediM]

Description of the Issue

Steps to Reproduce the Issue

1. Disconnect from the internet
2. Open plugin manager and click the installed plugins tab
3. Try to uninstall a plugin

Expected Behavior

I expected to be able to uninstall the plugin

Actual Behavior

I got an error telling me that plugin list cannot be downloaded, even when trying to uninstall an already installed plugin

Debug Information

[chcg]

Also the uninstall process is taking informations what to uninstall from the plugin list, but also without the download it should be possible to take the last cached list for this task. Need to check that.