Merge pull request #93 from pypeclub/bugfix/library_refresh

fix library loader refresh button

Author: mkolar

avalon/tools/libraryloader/app.py

@@ -141,7 +141,11 @@ def __init__(
         self.resize(1330, 700)
 
     def on_refresh_clicked(self):
-        self._set_projects()
+        assets_widget = self.data["widgets"]["assets"]
+        with tools_lib.preserve_states(
+            assets_widget.view, column=0, role=assets_widget.model.ObjectIdRole
+        ):
+            self._set_projects()
 
     def _set_projects(self, default=False):
         projects = self.get_filtered_projects()
@@ -181,6 +185,8 @@ def get_filtered_projects(self):
     def on_project_change(self):
         projects = self.get_filtered_projects()
         project_name = self.combo_projects.currentText()
+        if not project_name:
+            return
         self.dbcon.activate_project(project_name)
 
         _config = lib.find_config(self.dbcon)