Qt/PAD: Enable/Disable Player LED for DualSense Controllers in Enhanced mode

[dreamsyntax]

Description of Changes

This change adds a toggle to enable/disable the Player LED on DualSense controllers.
Not to be confused with the primary LED. The Player LED is a non-customizable bright white array of white LEDs that indicate the player number. Image of before and after.

The UI change is added to the LEDSettingsDialog

Rationale behind Changes

• RAW mode does not have Player LEDs on.
• Turning on Enhanced Mode turns on the Player LED in addition to the primary LED.
• There is no option to disable the Player LEDs currently. You can only customize the primary LED.
• A user may want to completely disable all LEDs on their controller. Currently you can disable the Primary LED but not the Player LED. This is distracting/bright when playing in low lighting conditions.
• You can already tell which player is which due to the customized primary LED colors.

Suggested Testing Steps

1. Connect DualSense controller. Note the player LED is off.
2. Turn on Enhanced DS4/DS5 mode under the PCSX2 Controller Settings.
   -- if on master --
3. Note the Player LED is ON. You can customize the Main LED but not the Player LED.
   -- if on this branch --
4. Note the Player LED is still OFF.
5. Enter the LED Settings Dialog (The lightbulb icon) and utilize the new Checkbox. You should see all connected controllers enable/disable their player indicator LEDs. You can customize the Main LED per-controller as usual.

[stenzek]

This sounds like a bad idea, since we use the player ID for allocating the identifier in SDL-N.

[dreamsyntax]

This sounds like a bad idea, since we use the player ID for allocating the identifier in SDL-N.

Good call out. I've completely changed this PR to achieve this with the SDL Hint instead now.
I've also updated the UI so it is a toggle.

Ready for review.

[RedDevilus]

Player LED on and off on my DualSense work fine. Though for expansion have you thought of adding specific things that DS4Windows add like where the player LED is you can show battery percentage or enable the mute button (orange light) which actually reduces battery usage (controller constantly sends audio even when it's not needed). Maybe this might be asking out of scope.

Which looks like this:

Only 3 because at 87%:

In your PR;
Player LED ON:

Player LED OFF:

[WolfKuzunoha]

yeah this thang works has my seal of approval 10/10

[dreamsyntax]

Player LED on and off on my DualSense work fine. Though for expansion have you thought of adding specific things that DS4Windows add like where the player LED is you can show battery percentage or enable the mute button (orange light) which actually reduces battery usage (controller constantly sends audio even when it's not needed). Maybe this might be asking out of scope.

Thanks for testing.
As for your suggestions, those could be done but it would definitely be another PR.

[AmyRoxwell]

Works on arch linux with the appimage!
Didn't test the flatpak