Add explanatory comments

src/simplewallet/simplewallet.cpp

@@ -10702,6 +10702,8 @@ int main(int argc, char* argv[])
     tools::signal_handler::install([&w](int type) {
       if (tools::password_container::is_prompting.load())
       {
+        // Runs the full exit routine after receiving Ctrl-C
+        // In current state we're incapable of gracefully exiting from here without major redesign, hence the blunt approach
         w.stop();
         w.deinit();
         _exit(0);