6.3: new error and save popups

- remade error and save popups. both are now properly located and sized on mobile screens. this is the first step in modernizing cobalt ui!
- fixed >> button getting stuck in error state.

package.json

@@ -1,7 +1,7 @@
 {
     "name": "cobalt",
     "description": "save what you love",
-    "version": "6.2.4",
+    "version": "6.3",
     "author": "wukko",
     "exports": "./src/cobalt.js",
     "type": "module",