add prefers-reduced-motion support (#audit-P2)

The transform: scale(.96) animation on button press (and all other
transitions/animations) had no reduced-motion alternative. Added:
@media (prefers-reduced-motion: reduce) { *, *::before, *::after {
  animation-duration: 0s !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0s !important;
}}

Covers btn, btn-icon, snap-slot, transport-btn, switch, file-drop,
loader, and CSS-in-JS elements (preset-chip-s, param-btn, etc.).

public/img/ic_bank.svg

@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 width="24px" height="24px" viewBox="0 0 24 24" enable-background="new 0 0 24 24" xml:space="preserve">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px"
+	 width="24px" height="24px" viewBox="0 0 24 24" fill="#F0EDE6">
 <path d="M18.993,8.993L18.99,5c0-1.1-0.891-2-1.99-2h-4h-3H6C4.9,3,4.01,3.9,4.01,5L4.007,8.993L4,9v10c0,1.1,0.891,2,1.99,2H6h11
 	h0.01c1.1,0,1.99-0.9,1.99-2V9L18.993,8.993z M17,10v9H6v-9V5h5h1h5V10z"/>
 <rect x="8" y="7" width="2" height="2"/>