Support arrow keys in application mode. (#627)

Depending on the Cursor Key Mode (DECCKM), the terminal sends different
escape sequences:

Key     Normal    Application
-----   --------  -----------
Up      ESC [ A   ESC O A
Down    ESC [ B   ESC O B
Right   ESC [ C   ESC O C
Left    ESC [ D   ESC O D
Home    ESC [ H   ESC O H
End     ESC [ F   ESC O F

I decided not to update the current mode to fit what FTXUI parse, but
instead support parsing both. We convert the sequences from the
"application mode" into the "normal mode".

Bug:https://github.com/ArthurSonzogni/FTXUI/issues/626
Fixed:https://github.com/ArthurSonzogni/FTXUI/issues/626