improve contacts search UI/UX
Issue generated from Tuleap's migration script. Originally submitted by: Romain B. (rbertozzi)
- replace the phone icon on the main activity by a magnifying glass
- allow the predicate to find contacts without phone numbers
- remove the autocorrect when finding a contact
- improve the textfield display
- adjust contact search layout to be pushed by the soft keyboard
- hide the contextual menu (Scan QR and clear history) when in contacts mode.