Remove unused picasso asset and update manifests

Delete app/assets/images/Untitled.picasso to remove an unused design asset; update config/edge-manifest.json and config/firefox-manifest.json (manifest changes applied). .DS_Store was also updated (binary metadata change). This cleans up the repository and ensures browser manifests are current.

Author: RobertJGabriel

.DS_Store

@@ -1,6 +1,6 @@
 {
 	"name": "__MSG_appNameEdge__",
-	"version": "2025.1.17",
+	"version": "2026.4.10",
 	"manifest_version": 3,
 	"description": "__MSG_appDescription__",
 	"homepage_url": "https://opendyslexic.org",

app/assets/images/Untitled.picasso

@@ -1,6 +1,6 @@
 {
 	"name": "__MSG_appNameFirefox__",
-	"version": "2025.1.17",
+	"version": "2026.4.10",
 	"manifest_version": 3,
 	"description": "__MSG_appDescription__",
 	"homepage_url": "https://opendyslexic.org",