Utils: Allow mimetype deep-scan for remote files

Text editors need to know the actual mimetype of a file to be able to
open the correct editor view. Just checking the extension is not
enough. Especially on linux there are many text files without
an extension.

Change-Id: I7e5c935b0619f5d86e97f10bfd7ff9b65da62f4b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/mainwindow.cpp

@@ -949,7 +949,8 @@ void MainWindow::openFile()
 static IDocumentFactory *findDocumentFactory(const QList<IDocumentFactory*> &fileFactories,
                                              const FilePath &filePath)
 {
-    const QString typeName = Utils::mimeTypeForFile(filePath).name();
+    const QString typeName = Utils::mimeTypeForFile(filePath, MimeMatchMode::MatchDefaultAndRemote)
+                                 .name();
     return Utils::findOrDefault(fileFactories, [typeName](IDocumentFactory *f) {
         return f->mimeTypes().contains(typeName);
     });