Add file_search config for file_search at start

labelme/app.py

@@ -441,6 +441,10 @@ class MainWindow(QtWidgets.QMainWindow, WindowMixin):
         else:
             self.filename = filename
 
+        if config['file_search']:
+            self.fileSearch.setText(config['file_search'])
+            self.fileSearchChanged()
+
         # XXX: Could be completely declarative.
         # Restore application settings.
         self.settings = QtCore.QSettings('labelme', 'labelme')

labelme/config/default_config.yaml

@@ -4,6 +4,7 @@ keep_prev: false
 
 flags: null
 labels: null
+file_search: null
 sort_labels: true
 validate_label: null
 show_label_text_field: true