UnifiedEmail: wrap message details in scroll view

If there are enough to/cc/bcc targets, the text will go off the scren.

Wrap it in a scroll view.

Change-Id: I2079fd18002421911566e99b1369ef7f09bbfaea
Signed-off-by: Roman Birg <roman@cyngn.com>
Merge remote-tracking branch 'cm/cm-11.0' into HEAD