Update the source code to support latest ios version

The app was developed base on iOS 6 with ionic. There are some functions are not support in latest iOS 11. Problem 1: PDF related function cannot be open normally after click the related pdf but need to pull up/down the screen or double click the Home button to active the pdf display. • Home -> The Avenue Clubhouse -> Clubhouse -> Events Calendar • Home -> The Avenue Clubhouse -> OC • Home -> Property -> Download Zone • Home-> Property -> Resident Info Problem 2: Account management page under setting, Client suppose able to manage more than one account, but some user had claim that was not function well.   Problem 3: Once the user had been logged in the clubhouse account, user supposed no need to further login when go to the clubhouse function, but the app is requesting to login again even user had been logged in. iPhone 6plus user had to double click the home button to solve this re-asking login which is un-normal. And iPhone X is still facing this problem even double click the home button. Awarded developer is responsible to - update the source code to support latest iOS version (iOS 11.4.1) with above problems fixed and no further problem found - test the updated source code in iOS 12 beta and give result report - fix the problems found after update the source code to latest iOS if any - make sure the fix apply to all iPhone models including below: • iPhone 6 Plus • iPhone 6s • iPhone 6s Plus • iPhone SE • iPhone 7 • iPhone 7 Plus • iPhone 8 • iPhone 8 Plus • iPhone X - provide the updated source code with proper comments - provide UAT for our testing before launch - launch the app to app store once we sign off the UAT - provide 5 days support service if any problems found by user after the app launch to make sure all the function running normal.