Text input events sometimes sent before keyboard::enter

[travankor]

Describe the bug
Wayfire sometimes sends IME events to clients before the client receives the keyboard focus event.

To Reproduce
Steps to reproduce the behavior:

1. Enable an IME client like squeekboard
2. WAYLAND_DEBUG=1 a client that supports IME events
3. Text input and keyboard events are sometimes not synchronized

Expected behavior
keyboard::enter() is sent before text_input_v3::enter().

Debug logs

[2144718.172] wl_keyboard@19.enter(461189, wl_surface@3, array)
[2144718.343] zwp_text_input_v3@16.enter(wl_surface@3)
...
[2147513.849] wl_keyboard@19.leave(461194, wl_surface@3)
[2147513.880] zwp_text_input_v3@16.leave(wl_surface@3)
...
[2154053.513] wl_keyboard@19.enter(461201, wl_surface@3, array)
[2154053.640] zwp_text_input_v3@16.enter(wl_surface@3)
...
[2155286.422] wl_keyboard@19.leave(461207, wl_surface@3)
[2155286.458] zwp_text_input_v3@16.leave(wl_surface@3)
...
[2155840.916] zwp_text_input_v3@16.enter(wl_surface@3)

Wayfire version
0.7.0

[ammen99]

I think this shouldn't be a problem anymore, we updated quite a lot about text-input, especially if you use the input-method-v1 plugin which will soon be merged #2172