Autocomplete for Contexts, projects and priorities

[ionsupplydrink]

When contexts are too numerous it is a pain to browse and choose them.
It should be possible to have an autocomplete inline (after have typed a @ or +) and also have a typing filter when using the context or project button (there is a nice example in the iOS application fastever for choosing the tags)

[ginatrapani]

Agreed autocomplete for projects/contexts is needed.