Description of problem:
There is no possibility to remove extension, which I've installed by gnome-tweak-tool (in 'Install Shell Extension' by loading extension file).

User have to remove all files manually, what is not user friendly at all. There should be some way to remove extension from gnome-tweak-tool

Version-Release number of selected component (if applicable):
gnome-tweak-tool-3.3.4-1.fc17.noarch

How reproducible:
always

Steps to Reproduce:
1. Open gnome-tweak-tool.
2. In Shell Extensions click on button with folder.
3. Choose some file with extension to install it
4. Try to remove just installed extension.
  
Actual results:
There is no way how to remove manually installed extensions

Expected results:
There should be possibility of removing extensions in gnome-tweak-tool

Additional info:
Distribution: Fedora