Sec Notes- Secure Notepad

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* New Premium backup service
* Collaborate with shared notes editable by all shared users
* View notes in browser.
* Password recovery service
* New light interface
* Fix app crashes
* Hide protected note's screenshot when navigating b/w apps.
* Fix #ERROR in spreadsheet when division produces decimals.
* Fix backup file permission for android 10
* Fix app crash when network error.
* Fix alarms in Oreo
* Fix search error in Android Oreo
* Print and export notes as pdf.