v1.5.3 — Right stick processing fixed, new Fast curve, auto-save

Fixed

Right Stick processing now actually works: the enable toggle previously had no effect (settings were silently dropped). The Right Stick tab also gets the full editor: deadzone, response curve, speed multipliers and smoothing.
Settings no longer reset on restart: the active profile is saved automatically when you close the program (manual Save still works as before).

Fast response curve (available for both sticks): the strongest mid-range boost of all curves - small stick movements become much larger, for maximum lightness and speed.
- Linear = raw 1:1
- Soft = slower start (precision)
- Aggressive = faster than raw
- Fast = fastest (input 25% -> output 50%)

This is a mandatory update: older builds show a blocking update screen at startup and update in one click.