Fixed permission issue and onboarding.html issue

A lot of changes to match it up with the Chrome Extension latest features
Version 4.0.1
FIXED
Minor fixes to Calculated Metric and Calculator
Fixed minor issues with Calculated Metric and Calculator features for better stability.

Version 4.0.0
NEW
Save Quick Calculated Metrics
Save your quick calculated metrics like Exit rate and enable automatically

NEW
International Decimal Support
Set decimal format to comma or dot for international users

IMPROVED
Enhanced Interface
Improved popup and user interface experience

Version 3.9.0
NEW
AB Test Segment Compare
Auto-calculates lift and significance on hover for segment comparisons

IMPROVED
Performance Improvements
Enhanced overall extension performance and stability

Version 3.8.0
NEW
Line Chart Customization
Customize line chart colors and add Hour view