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).

package.json

@@ -1,7 +1,7 @@
 {
     "name": "cobalt",
     "description": "save what you love",
-    "version": "5.6",
+    "version": "5.7",
     "author": "wukko",
     "exports": "./src/cobalt.js",
     "type": "module",