ui: clean indexed header path selection

* for CDB projects the selection dialog for the indexed header paths now discards all paths that are subdirectories of other entries

src/lib/utility/utility.h

@@ -166,8 +166,7 @@ std::vector<T> utility::unique(const std::vector<T>& a)
 		}
 	}
 
-	std::vector<T> r;
-	r.reserve(i);
+	std::vector<T> r(i, T());
 	for (const std::pair<T, size_t>& p : unique)
 	{
 		r[p.second] = p.first;

src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentPaths.cpp

@@ -292,7 +292,24 @@ void QtProjectWizzardContentPathsCDBHeader::buttonClicked()
 		utility::CompilationDatabase cdb(cdbPath.str());
 
 		std::vector<FilePath> sourcePaths = m_settings->getSourcePaths();
-		std::vector<FilePath> cdbHeaderPaths = utility::unique(utility::concat(sourcePaths, cdb.getAllHeaderPaths()));
+
+		std::vector<FilePath> cdbHeaderPaths;
+		for (const FilePath& path: utility::unique(utility::concat(sourcePaths, cdb.getAllHeaderPaths())))
+		{
+			bool addPath = true;
+			for (const FilePath& cdbHeaderPath: cdbHeaderPaths)
+			{
+				if (cdbHeaderPath.contains(path))
+				{
+					addPath = false;
+					break;
+				}
+			}
+			if (addPath)
+			{
+				cdbHeaderPaths.push_back(path);
+			}
+		}
 
 		dynamic_cast<QtSelectPathsDialog*>(m_filesDialog.get())->setPathsList(cdbHeaderPaths, sourcePaths);
 	}