Small usability improvements

• Updated translations (you can update/vote for the correct translation on Crowdin - link is provided in the app)
• Remove ru-RU language support, added ru-UA
• Bring context menu on three dots clicks (@ebraminio)
• Replace the deprecated ProgressDialog with app custom one (@ebraminio)
• Add launcher shortcut for Android TV (@Ismael034)
• Add roundness to the dialogs (@Ismael034)