6b9b12c303
This commit removes all traces of setting and reverting the input focus in i3-input. We don't need to do this because grabbing the keyboard is sufficient to have the attention we need. Changing the input focus and reverting it can cause situations where i3 executes the IPC command before processing the FocusIn events. This leads to i3's input focus change to be rejected due to the timing, leading to an inconsistent focus state. fixes #2597
