Some fixes in translated strings

- doesn't make sense to translate "%1"
- showPreprocessedFile: "reason" contains full stop, put at the end
- add missing closing >
- remove whitespace at the end of translated string
- added missing quotes and full stops
- Remove some control text from tr

Change-Id: I5537c3d12d038e25e2209af1198129fbf959b43c
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

src/plugins/cppeditor/cppmodelmanager.cpp

@@ -354,8 +354,8 @@ void CppModelManager::showPreprocessedFile(bool inNextSplit)
                                             .arg(reason));
     };
     static const auto showFallbackWarning = [](const QString &reason) {
-        Core::MessageManager::writeSilently(Tr::tr("%1, falling back to built-in preprocessor.")
-                                            .arg(reason));
+        Core::MessageManager::writeSilently(
+            Tr::tr("Falling back to built-in preprocessor: %1").arg(reason));
     };
     static const auto saveAndOpen = [](const FilePath &filePath, const QByteArray &contents,
                                        bool inNextSplit) {