Ability to backup setting.

[krishnakanthb13]

Ability to backup settings.

1. Backup Icon/Emojis and Color selections for tasks.
2. Backup Icon/Emojis and Color selections for tags.
3. Icon/Emojis and Color selections for categories.
4. All the options in the Setting Tab.

This way it will be very helpful when moving from one phone to the other.

Purpose: When moving from one phone to the other, it should just replicate the complete set up from the old phone or backup phone. The process should be very seamless. (A replica of the current app!).