[messaging app] proposed contacts search blinks after a single letter input

[Olga Kemmet]

Steps to reproduce:

1. open messaging app
2. swipe from the bottom edge to compose a new message
3. type a letter into the contacts input field in the header -> the proposed contacts list appears from nowhere
4. type a 2nd letter -> the proposed list "blinks" and shows the filtered results again
5. type a 3rd letter -> proposed list "blinks" again and shows results

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Expected result:

3. the proposed contact list should "roll out" from the top, from underneath the header in a smoother way after typing in the first letter or number (if there is a match)
4. after typing the 2nd letter, the list shouldn't blink; the not matching entries should disappear and the matching items just move up smoothly into view
5. see previous point