Viacheslav Muravyev

Check if dock layout is mounted when force update on remove tab cache

1

Hello! This PR fixes the bug related with memory leak when state updates on unmounted component. I faced with this bug when created dock layout within tab of dock layout...

The PR removes unused parameter in Divider component method.

`req` parameter is unused in uv__req_register and uv__req_unregister macros. So, I suggest to remove it.

Calculate can_sleep outside of loop within uv_run

17

`can_sleep` can be calculated once outside the loop. For `mode` equals to UV_RUN_DEFAULT `can_sleep` is always equals to `true`; For `mode` equals to UV_RUN_ONCE `can_sleep` value depends on pending callbacks...