Your english is very good, probably better than mine so don't worry about it.
I'll reply quickly now before sending out beta 1 to testers: yes, the new option was inspired by your suggestion and thsoe of others. When "Show contacts who have you" is enabled, the Delete button will be replaced by an "Add" one which makes more sense, as you said.
I encourage testers to read your post fully and reply appropriately. Right now, the feature as it's been added seems useful enough to me
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