configure_input: Hook up the vibration percentage spinbox

This allows setting the vibration strength percentage anywhere from 1% to 100%.
Also hooks up the remaining motion button and checkbox in the Controller Applet.

src/core/hle/service/hid/controllers/npad.cpp

@@ -703,7 +703,8 @@ void Controller_NPad::VibrateController(const std::vector<DeviceHandle>& vibrati
 
         // TODO: Vibrate left/right vibration motors independently if possible.
         button_state[A - BUTTON_HID_BEGIN]->SetRumblePlay(
-            vibration_values[i].amp_high, vibration_values[i].amp_low,
+            vibration_values[i].amp_high * Settings::values.vibration_strength.GetValue() / 100,
+            vibration_values[i].amp_low * Settings::values.vibration_strength.GetValue() / 100,
             vibration_values[i].freq_high, vibration_values[i].freq_low);
 
         latest_vibration_values[npad_index][device_index] = vibration_values[i];

src/core/settings.cpp

@@ -150,6 +150,7 @@ void RestoreGlobalState() {
     values.players.SetGlobal(true);
     values.use_docked_mode.SetGlobal(true);
     values.vibration_enabled.SetGlobal(true);
+    values.vibration_strength.SetGlobal(true);
     values.motion_enabled.SetGlobal(true);
 }
 

src/core/settings.h

@@ -170,6 +170,7 @@ struct Values {
     Setting<bool> use_docked_mode;
 
     Setting<bool> vibration_enabled;
+    Setting<int> vibration_strength;
 
     Setting<bool> motion_enabled;
     std::string motion_device;