CoreTiming: Add "Rush Frame Presentation" setting to throttle only once after each presentation for lower input latency.

Source/Core/DolphinQt/Settings/AdvancedPane.cpp

@@ -114,6 +114,19 @@ void AdvancedPane::CreateLayout()
          "<br><br><dolphin_emphasis>If unsure, leave this unchecked.</dolphin_emphasis>"));
   timing_group_layout->addWidget(correct_time_drift);
 
+  auto* const rush_frame_presentation =
+      // i18n: "Rush" is a verb
+      new ConfigBool{tr("Rush Frame Presentation"), Config::MAIN_RUSH_FRAME_PRESENTATION};
+  rush_frame_presentation->SetDescription(
+      tr("Limits throttling between input and frame output,"
+         " speeding through emulation to reach presentation,"
+         " displaying sooner, and thus reducing input latency."
+         "<br><br>This will generally make frame pacing worse."
+         "<br>This setting can work either with or without Immediately Present XFB."
+         "<br>An Audio Buffer Size of at least 80 ms is recommended to ensure full effect."
+         "<br><br><dolphin_emphasis>If unsure, leave this unchecked.</dolphin_emphasis>"));
+  timing_group_layout->addWidget(rush_frame_presentation);
+
   // Make all labels the same width, so that the sliders are aligned.
   const QFontMetrics font_metrics{font()};
   const int label_width = font_metrics.boundingRect(QStringLiteral(" 500% (000.00 VPS)")).width();