Description of the Issue

When you have the auto-complete number lowered to 1 or 2 (which is often useful), the list of options can get very long, so the current behaviour of jumping to different portions instead of refreshing/trimming the list can be cumbersome (especially since the list is grouped by category).

Steps to Reproduce the Issue

1. Add the following strings to a fresh file: abcd, abdc, acbd, acdb, adbc, adcb
2. Set the Auto-Complete number to 1.
3. Type 'a' to trigger an auto-complete list.
   
4. Type 'd'.

Current Behavior

The first 4 items remain, and the highlighted entry jumps to the 5th.

Requested Behavior

The first 4 items are cleared away.

Current Workaround

Delete the 'd' and retype.

Debug Information