Keep keyboard open after sending the message
This only took two years to figure out!
Force the TextArea to keep focus when a click happens outside of it. This way messages can be scrolled or the send button clicked and the focus stays in the TextArea (cursor), keeping the keyboard open. The keyboard can be closed manually by swiping down as always.
Fixes #337 (closed)
Tested with SFOS 3.4 and 4.5 on-device.