5.1.0

Added an option for toggling 24 hour time format
Added an option to show only contacts with phone numbers
Do not allow creating contacts under WhatsApp contact source
Try fixing the issue with disappearing contacts under some circumstances
Fix some bugs related to selecting contact photo from the device storage
Show the contact email at the list, if name and organization are empty
Properly sort groups containing UTF-8 characters at title
Use a different placeholder image for business contacts