ProjectExplorer: Add special handling for removing files

... from a project which are pulled in via wildcards.
Such files cannot be removed from a project file, because they are
not listed verbatim. This kind of failure should not be reported to the
user if the file is also deleted, as the file list will have the correct
state after the next reparse.

Fixes: QTCREATORBUG-22586
Done-with: Christian Kandeler <christian.kandeler@qt.io>
Change-Id: I3dc66fe9a6594be7d0b86f46d830cd099ee49fd7
Reviewed-by: hjk <hjk@qt.io>

src/plugins/genericprojectmanager/genericproject.cpp

@@ -143,9 +143,11 @@ public:
         return m_project->addFiles(filePaths);
     }
 
-    bool removeFiles(const QStringList &filePaths, QStringList * = nullptr) override
+    RemovedFilesFromProject removeFiles(const QStringList &filePaths,
+                                        QStringList * = nullptr) override
     {
-        return m_project->removeFiles(filePaths);
+        return m_project->removeFiles(filePaths) ? RemovedFilesFromProject::Ok
+                                                 : RemovedFilesFromProject::Error;
     }
 
     bool renameFile(const QString &filePath, const QString &newFilePath) override