Add an option to deduplicate same address for a contact

[vincowl]

I have some contacts who have the same professional address as their personal one. It would be great to add an option to deduplicate these adresses, thus it would display only one marker instead of multiple ones for a same contact. If it sounds interesting I can try to submit a PR

[tacruc]

This sounds cool.
A PR would be highly appreciate.

[tacruc]

If you need help or have questions, feel free to ask.

[tacruc]

Actually I would not make it an option. I would just deduplicate them always.

[vincowl]

Fine ! I'll donthat and submit a PR as soon as I'll have Time for this. I'll juste deduplicate if addresses are exactly the same string.

[tacruc]

Fix thanks to @vincowl