Message 241429 - Python tracker

Additionally, pressing tab after the autocomplete window has appeared should not just update the text but also close the autocomplete window.

The repro steps are (on Windows 7 64-bit, Python 3.5):

1. Type "pri"
2. Press Ctrl+Space or click Edit > Show Completions. The autocomplete window appears.
3. Press Tab. The text updates from "pri" to "print"
4. However, the autocomplete window is still there.
5. Pressing space or ( will then cause the autocomplete window to disappear.