Beta build 0.6.6 is available for testing.

Changelog
- Automatically convert comma to stop for share/cost/comm fields in edit sheets.
- Add gain percentage in pull-down portfolio performance banner.
- Backend improvement to fix wrong fractional numbers when accumulating portfolio performance data.
- Partially fix local portfolio performance data unavailable in pull-down banner at app start up when google login is enabled. Now the performance data are populated after update timer is triggered or after user manually refreshes the quote data.