Edit profile page changes, closes The biography resets when reducing the keyboard #1245

[nunibye]

Changes made to the edit profile page include:

• Removed padding from top and bottom outside ListView and added padding inside ListView.
• Added scroll behavior and GestureDetector to hide keyboard.
• Refactored to use widgets instead of functions for performance.
  • Each field owns it controller ensuing dispose is called.
  • closes The biography resets when reducing the keyboard #1245
• Made screen pop on successful save.
• trimmed all text fields before upload.
• added PopScope to reduce accidental data loss.
  Some kind of dialog should be displayed before exiting, but that will require changing the appbar and I haven't quite figured out all the custom widgets to maintain native feel.

[veloce]

Thanks!

I added the confirm dialog here: 6c43166