view.LFTPD: no log file found error message

Depends-on: https://github.com/suprojs/supro/commit/83802a32c7fb62439f7d00fc1a0432348418298d
Signed-off-by: Oleg Verych <olecom@gmail.com>
view.LFTPD: model.on(datachanged) for all items in grid

bind to all models (and not only to thiose which log tab was opened)
also filter false one-char status updates using `return false`
of event handler

but even this filtering don't prevent all after-highlights (see comments)

Depends-on: https://github.com/suprojs/supro/commit/34f212939e6466c50c5f87e63922ae08a858e68d
Signed-off-by: Oleg Verych <olecom@gmail.com>
log_channel: serve log file by date even if there's no running `lftp`

not found UI error message is in e0a0a4a96bfe7ee80a7dfab1a2e2e430077aaa10

Signed-off-by: Oleg Verych <olecom@gmail.com>