Allow (optionally) running multiple instances
ApplicationFlags.CAN_OVERRIDE_APP_ID enables the --gapplication-app-id flag. If an instance of dconf-editor is open one can use the flag to open a new instance:
dconf-editor --gapplicaton-app-id org.my-app.dconf-editor
This can be useful to edit database entries with non-installed schemas[1] without closing an already open editor. gnome-shell extensions being an example.
[1] By using the GSETTINGS_SCHEMA_DIR env variable
ref: #39