Quick AppRemover udpate

Rolled out new Quick AppRemover release. It has several bug fixes:

• the main thing that pushed us to work on the next release was that you need to manually tap on "Refresh" button to refresh installed apps when you launched the Quick AppRemover again;
• fixed bug in the apps list, that showed null if there is no app version;
• added more numbers after decimal point, to see more accurate app sizes;
• changed "About" screen, added "Rate it" and "More apps" buttons.