Create download directory recursively and show error message

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Create ModArchive folder by default

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Use search button in soft keyboard

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>