[Generic Editor] Add a Refactorings menu to the Generic Editor to allow command contributions

[ylussaud]

Let's make sure issue is not already fixed in latest builds first.

• [X] I verified latest Integration Build of Eclipse SDK doesn't provide the feature.

Suggestion

I made a pull request to the LSP4E project and we think it would be better to move the Refactorings menu to the Generic Editor. This would allow anyone extending the Generic Editor to contribute refactoring commands in the same menu.

Community

If you think it's a good idea I can provide a pull request.

• [X] I understand suggesting an enhancement doesn't mandate anyone to implement it. Other contributors may consider this suggestion, or not, at their own convenience. The most efficient way to get it fixed is that I implement it myself and contribute it back as a good quality patch to the project.