Autocompletion grabbed from task list

Feature request.

Suppose the task list looks like this

+ group 1 is not a dumb one
 -- nice and easy task A
 -- note nice task B
 -- task C
 + group 2 for dummies
 -- task X
 -- task Y
 -- task Z

When add a task by typing in the edit field I'd like to see some codecompletion like.

While typing
 ' d u m'
The completion should show
  "group 1 is not a dumb one"
  "group 2 for dummies"

Continuing to type
 'd u m b'
The completion should ONLY show
  "group 1 is not a dumb one"

to accept the proposed GroupName i than have 2 options.

1/ type ':' which will accept the first hit i.e "group 1 is not a dumb one"
2/ press down-arrow (to select the first entry in the suggestion list) and press enter-key

Contining to type
 'group 1 is not a dumb one : n -- i -- c --- e"
The completion should show
  "nice task A"
  "not nice task B"

Continuing to type
 'group 1 is not a dumb one : n -- i -- c --- e -- --- a "
The completion should ONLY show
  "nice and easy task A"

to accept the proposed TASKNAME i than have 2 options.

1/ type ':' which will accept the first hit i.e "task A"
2/ press down-arrow (to select the first entry in the suggestion list) and press enter-key

net result is that the TASK list actually provides suggestions for my timelog entries