Adjust Touchscreen Controls Opacity

[MayImilae]

This updates the onscreen buttons' opacities to be more friendly to opacity adjustment from #9439, and alters the default opacities in that opacity setting to roughly match how they were before 9439.

All buttons are optimized with Optifine to strip out Photoshop leftovers.

[Screenshots To Go Here]

---

Full Change List

• Text changed from 70% opacity to 100%

• White buttons changed from 50% to 80%

• Pressed (Black) buttons changed from 75% to 90%

• Nunchuk Z lost gradient

• Wiimote B gradient adjusted 30-65

• Home button outer ring adjusted to 30% opacity

• altered classic L and R buttons to fix small pixel alignment whoops

• altered gamecube z to fix small pixel alignment whoops

• Dpad Pressed is now:

  • active "text" 100%
  • inactive "text" 20%
  • pressed area 100%
  • unpressed area 50%

• Joystick area unaltered

[JosJuice]

It looks like a lot of the PNG files had their permissions changed to be executable. (GitHub's list of changes shows this as 100644 → 100755.) Also, you used the name wiimote_2.png instead of wiimote_two.png. Could you fix those two things? LGTM otherwise.

[JosJuice]

Screenshots of the fixed version of this PR (the earlier version had only updated the xxxhdpi files, which were not in use on my phone):

[JMC47]

Are there comparison shots to before? Just for easy access to see them.

[JosJuice]

Here are screenshots of master:

[JMC47]

Here's from before the previous opacity changes. F-Zero GX doesn't work in that build.

[JMC47]

Looks better to me.