Fixed non working hinting mode for ;o and ;t.

If the hint-input-* commands where used and the hinted elements where selected
by number, the input box was cleared immediately after it where filled,
because of the to late deactivation of hint mode in command_input.
Remove unneeded focus switching in inputbox_activate_cb.

I don't know why I've added this, but at the moment I can't find any reason or
use case where this might be required. Instead this make the ':input' command
called from inputbox hard to use, because the focus is removed from inputbox.