Reduce differences with upstream due to import style (#2465)

Fix relative / VS absolute style imports, and fix whitespace discrepancies

app/javascript/flavours/glitch/features/ui/util/optional_motion.js

@@ -1,6 +1,6 @@
 import Motion from 'react-motion/lib/Motion';
 
-import { reduceMotion } from 'flavours/glitch/initial_state';
+import { reduceMotion } from '../../../initial_state';
 
 import ReducedMotion from './reduced_motion';