Improved Localization And Read Only Users

Mobile version now supports localization (with same URL parameter ?locale=XX) with language selection.

Desktop version also now has an ability to select language at login screen.

Polish translation was updated (thanks to bigoss and dumar github users).

Then added new feature - ability to mark user read-only.

This release contains changed order of buttons in archive toolbar (was 'Load, Import/Export, Clear', now it's 'Load, Clear and Import/Export') for better user experience (thanks to bigoss github user).