Autocomplete for Additional attributes
Summary
Additional attributes should provide autocompletion for keys and values, just like Username field does.
Examples
Attribute, no auto-completion:

Username, with auto-completion:

Context
I often use Additional attributes section to store some data related to a record in a structured way. Usually these attributes are email (I have several ones for different occasions), date of birth (yep, I never share the real one), secret questions&answers and so on and so forth. So, keys (names) of attributes are mostly repetitive, which is why it would be nice of KeePassXC to auto-complete them for me.
This would be obsolete with the introduction of entry templates: #863
Has this seen any updates, it is something I am looking for as well. I use this along with an android app keepass2android which uses the attributes AndroidApp1 and AndroidApp2 to know which apps to use and it is a pain to put them in on the desktop, my preferred manager.
Are there any news about this feature request?
This would be obsolete with the introduction of entry templates: #863
Actually it would not been obsolete, since one could add an Additional Attribute to an existing entry without creating a new entry (from a template).
I vote +1