Fix problem with user config dissapearance on ionic v6.0

[IraSoro]

Ionic may lost user's config when we upgrade version from ionic 5.0 to ionic 6.0
Looks like that to avoid this behavior we should migrate from localStorage based solution to native ionic's solution based on either ionic/storage or capacitor/storage.

How to reproduce problem:

• Install version with old packages, mark some date or do anything to fill storage with data
• Upgrade packages (to do this you can cherry-pick commits from this branch Fixed Download latest release button #243)
• Install new version with new packages

Expected:
All user cycles and other data from storage are loaded on startup

Real:
All user cycles and other data from storage are lost

[imblowfish]

Ionic has a special package to store preferences https://capacitorjs.com/docs/v5/apis/preferences