Changed default settings and more explaining error messages

Author: paulober

package.json

@@ -299,7 +299,7 @@
         },
         "picowgo.rebootAfterUpload": {
           "type": "boolean",
-          "default": true,
+          "default": false,
           "title": "Reboot after upload",
           "description": "Reboots your board after any upload action.",
           "order": 11

src/settings.mts

@@ -1,4 +1,4 @@
-import { Memento, WorkspaceConfiguration, workspace } from "vscode";
+import { Memento, WorkspaceConfiguration, window, workspace } from "vscode";
 import { PyboardRunner } from "@paulober/pyboard-serial-com";
 import { getProjectPath } from "./api.mjs";
 import { join } from "path";
@@ -71,10 +71,21 @@ export default class Settings {
         }
       } catch (e) {
         console.error(e);
+        window.showErrorMessage(
+          "Error while reading (COM) ports for autoConnect: " + e
+        );
       }
     }
 
-    return this.getString(SettingsKey.manualComDevice);
+    let manualComDevice = this.getString(SettingsKey.manualComDevice);
+    if (manualComDevice === undefined || manualComDevice === "") {
+      manualComDevice = undefined;
+      window.showErrorMessage(
+        "autoConnect setting has been disabled (or no Pico has been found automatically) but no manualComDevice has been set."
+      );
+    }
+
+    return manualComDevice;
   }
 
   /**