chatview: grow text area when pasting multiple lines
chatview: grow text area when pasting multiple lines

Change-Id: I43c2a84289bfd19a7012981690a9d1de88cc7977

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc