Hook up the new (bare-bones) ImGui debug window to GPU stepping, fix stepping.

Windows/Debugger/Debugger_Disasm.cpp

@@ -407,7 +407,6 @@ BOOL CDisasm::DlgProc(UINT message, WPARAM wParam, LPARAM lParam) {
 
 						// If the current PC is on a breakpoint, the user doesn't want to do nothing.
 						breakpoints_->SetSkipFirst(currentMIPS->pc);
-
 						Core_Resume();
 					}
 				}