Trace logger not de-activated when logger window closed

Tested with:
- BizHawk 2.0.1 x64
- Atari 2600 emu

Steps to reproduce:
- enter frame by frame mode or pause emulation
- open trace logger
- enable logging
- close the trace logger window

Bug description: the emulation is as slow as when trace logger is opened and logging activated.
Possible bug cause: trace logger is not de-activated when trace logger window is closed