release: v4.8.10 user-configurable STUN/TURN servers

- add header gear + connection-screen entry points to Advanced network settings
- render the ICE settings modal at the app root (reachable from any screen via event)
- remove the standalone relay-only toggle/description from the start screen
  (relay-only now lives in the advanced settings panel)
- fix crash from referencing main-component state inside EnhancedConnectionSetup
- bump version to 4.8.10 across header, manifest, README, init message, disclaimer
- document the feature in CHANGELOG and README

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "securebit-chat",
-  "version": "4.8.9",
+  "version": "4.8.10",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "securebit-chat",
-      "version": "4.8.9",
+      "version": "4.8.10",
       "license": "MIT",
       "dependencies": {
         "base64-js": "1.5.1",