text_input: Ignore text_input disable from unfocused windows
text_input: Ignore text_input disable from unfocused windows

Before this commit, there would be cases where focus changes from one
window to another, the new window activates text_input, then the old
window sends a deactivate request, making text_input unfocused
completely.

1ace/sway,1ace/sway,1ace/sway