5.7: ui improvements

- padding (everywhere) has been slightly reduced to fit in more content.
- padding is now consistent across ui.
- added more info to the "how to save" popup for ios devices.
- crypto wallet press-to-copy buttons now look like buttons.
- improved looks for smallest screens (iphone 5, 5s, se, etc).

src/modules/config.js

@@ -16,4 +16,5 @@ export const
     donations = config.donations,
     ffmpegArgs = config.ffmpegArgs,
     supportedAudio = config.supportedAudio,
-    celebrations = config.celebrations
+    celebrations = config.celebrations,
+    links = config.links