Update changelog.md

Alpha - 2 (#22)

* Tablet detection with KISS principle

* Batch load settings translation

* Batch load settings test

* UA Translation fix

* Batch load settings release

* Update dependencies

* Index page overflow fix testing

* New text entries for testing

* Export function placeholder UI

* Fixed that absence of the username made the app unresponsive.

* Translations for upcoming feature

* Added Changelog

* Changed dependencies and incremented app version

* Updated the Readme

* Removed obsolete permissions

* Added saving indexed files to JSON

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