DolphinQt: Allow toggling most JIT debug settings at any time

There's no reason not to allow this now that these settings are
cleanly integrated into the new config system. (Actually, maybe
we could even have done this before the previous commit...)

Source/Core/DolphinQt/MenuBar.cpp

@@ -137,20 +137,10 @@ void MenuBar::OnEmulationStateChanged(Core::State state)
   m_jit_interpreter_core->setEnabled(running);
   m_jit_block_linking->setEnabled(!running);
   m_jit_disable_cache->setEnabled(!running);
-  m_jit_disable_fastmem->setEnabled(!running);
   m_jit_clear_cache->setEnabled(running);
   m_jit_log_coverage->setEnabled(!running);
   m_jit_search_instruction->setEnabled(running);
 
-  for (QAction* action :
-       {m_jit_off, m_jit_loadstore_off, m_jit_loadstore_lbzx_off, m_jit_loadstore_lxz_off,
-        m_jit_loadstore_lwz_off, m_jit_loadstore_floating_off, m_jit_loadstore_paired_off,
-        m_jit_floatingpoint_off, m_jit_integer_off, m_jit_paired_off, m_jit_systemregisters_off,
-        m_jit_branch_off, m_jit_register_cache_off})
-  {
-    action->setEnabled(running && !playing);
-  }
-
   // Symbols
   m_symbols->setEnabled(running);