Auto-complete organisation name and identifier

[rolfkleef]

Inspired by #163, and to help with finding organisation identifiers: it would be great if AidStream could offer an auto-completion or lookup feature for organisation names.

What I envision:

• You start typing a name, and get a list of suggestions.
• Suggestions could be from names in your own data on top, and names used in other accounts as well (perhaps those with an identifier listed before those without).
• When there is a known organisation identifier, it could be auto-filled in as well.

The system-wide lookup list might be somewhat curated, or pre-populated.

There also might be a feature to check organisation names in your data at any point, to see if you could enrich or update existing data. Maybe like the "check duplicates" in Google Contacts: you see something in one of your activities and possible matches, and get to decide whether you want to update your information.

That feature would maybe be a different scenario to accomplish global changes of organisation identifiers as sketched in #163. The general lookup feature would improve data quality and ease of use when entering information.