Add setting for external link handling

Introduced an option for users to open external links in their default browser rather than within the app. Enabled by default, can be configured in menu.

#240

app/config/menu.js

@@ -454,6 +454,20 @@ const commonPreferencesSubmenu = [
     },
     checked: getValue("blockadsandtrackers") === "true",
   },
+  {
+    label: "Open External Links in Default Browser",
+    type: "checkbox",
+    click: () => {
+      setValue("externalLinks", getValue("externalLinks") === "true" ? "false" : "true");
+      dialog.showMessageBoxSync({
+        type: "info",
+        title: "External Links in Default Browser",
+        message: `External links will now open in ${getValue("externalLinks") === "true" ? "your default browser" : "MS-365-Electron"}`,
+        buttons: ["OK"],
+      });
+    },
+    checked: getValue("externalLinks") === "true",
+  },
   { type: "separator" },
   {
     label: "Windows User-Agent String",

app/config/store.js

@@ -33,6 +33,7 @@ getValueOrDefault("windowWidth", 0.71);
 getValueOrDefault("windowHeight", 0.74);
 getValueOrDefault("customWindowSize", false);
 getValueOrDefault("aptabaseTracking", null);
+getValueOrDefault("externalLinks", "true");
 
 if (getValue("enterprise-or-normal") === "https://microsoft365.com/?auth=1") {
   setValue("enterprise-or-normal", "?auth=1");