added format function for datetime, random color generating function and function returning itemType for cvu

 - Showed the error instead of going to keys saved page

 - Updated the the default pod url for the production environment

 - Fixed the review problems

 - Fixed some bugs
 - Code improvements

 - Fixed the init without pod

 - Fixed the merge conflicts

 - Minor fix

 - Fixed a bug in the onboarding_developer

 - Fixed the login problem

 - Fixed a bug after sign out

 - Renamed a setting param

 - Fixed the Error 400
 - Improved the code quality in the sync_controller
 - Added sync_config in the model

 - Improved the performace of onboarding pages
 - Updated the authentication part
 - Refactored some part of codes
 - Fixed some bugs

 - Updated the app_settings for QA env