Enhance language detection while "Save as"

By using detectLanguageFromTextBegining function

PowerEditor/src/ScitillaComponent/Buffer.cpp

@@ -1083,6 +1083,9 @@ bool FileManager::saveBuffer(BufferID id, const TCHAR * filename, bool isCopy, g
 			if (lengthDoc == 0)
 				items_written = 1;
 		}
+		
+		// check the language du fichier
+		LangType language = detectLanguageFromTextBegining((unsigned char *)buf, lengthDoc);
 
 		UnicodeConvertor.fclose();
 
@@ -1122,12 +1125,11 @@ bool FileManager::saveBuffer(BufferID id, const TCHAR * filename, bool isCopy, g
 			return true;	//all done
 		}
 
-		buffer->setFileName(fullpath);
+		buffer->setFileName(fullpath, language);
 		buffer->setDirty(false);
 		buffer->setStatus(DOC_REGULAR);
 		buffer->checkFileState();
 		_pscratchTilla->execute(SCI_SETSAVEPOINT);
-		//_pscratchTilla->markSavedLines();
 		_pscratchTilla->execute(SCI_SETDOCPOINTER, 0, _scratchDocDefault);
 
 		generic_string backupFilePath = buffer->getBackupFileName();