Add support for code actions besides ApplyChangesOperation's

src/OmniSharp.Roslyn.CSharp/Services/Refactoring/V2/RunCodeActionService.cs

@@ -68,6 +68,11 @@ public override async Task<RunCodeActionResponse> Handle(RunCodeActionRequest re
                         changes.AddRange(fileChangesResult.FileChanges);
                         solution = fileChangesResult.Solution;
                     }
+                    else
+                    {
+                        o.Apply(this.Workspace, CancellationToken.None);
+                        solution = this.Workspace.CurrentSolution;
+                    }
 
                     if (request.WantsAllCodeActionOperations)
                     {