camscanner

- Added changing default file type for sharing setting.
- Added changing default screen when app starts setting.

- Added primary button control to be reusable.
- Added custom picker to be reusable.
- Added no indicator scroll view to be reusable.

- Added empty and generic action to be reusable.

- Added custom modifiers to:
	* change color.
	* change corner radius.
	* read view's size.
	* display sheets.