Make entrys in the address book unique

[greasyy]

When using the address book it is possible to make a number of entrys and name them the same. I can e. g. make 10 address entrys with the name "Address 01" and can't differentiate them from one another by name anymore.
Entries in the address book should be unique, so they can be distinguished from one another.

Also the same address can be entered multiple times in different entries, they should be made unique for one entry only as well.

Scrolling in the address book does sometimes work and sometimes not.
If you have over 10 address book entries you have to first click somewhere in the address book to be able to scroll through the book with the mouse wheel. The address book should always be in front if opened, so scrolling with the mouse wheel is possible straight away.

[angievi]

Thanks for making us aware of these issues and improvements, we'll add them to our backlog! @greasyy