Increasing it was mostly to paper over animation jerkiness which
shouldn't be a problem anymore since we removed the desaturate and
blur effects.
https://bugzilla.gnome.org/show_bug.cgi?id=696380
// - CURTAIN_SLIDE_TIME is used when raising the shield before unlocking
// - INITIAL_FADE_IN_TIME is used for the initial fade in at startup
const STANDARD_FADE_TIME = 10;
-const MANUAL_FADE_TIME = 0.8;
+const MANUAL_FADE_TIME = 0.3;
const BACKGROUND_FADE_TIME = 1.0;
const CURTAIN_SLIDE_TIME = 0.3;
const INITIAL_FADE_IN_TIME = 0.25;