fix addition boards url outline

Author: Alberto Iannaccone

arduino-ide-extension/src/browser/dialogs/settings/settings-dialog.tsx

@@ -155,7 +155,6 @@ export class AdditionalUrlsDialog extends AbstractDialog<string[]> {
 
     this.textArea = document.createElement('textarea');
     this.textArea.className = 'theia-input';
-    this.textArea.setAttribute('style', 'flex: 0;');
     this.textArea.value = urls
       .filter((url) => url.trim())
       .filter((url) => !!url)

arduino-ide-extension/src/browser/style/settings-dialog.css

@@ -88,10 +88,12 @@
 }
 
 .additional-urls-dialog textarea {
-    width: 100%;
+    resize: none;
 }
 
 .p-Widget.dialogOverlay .dialogBlock .dialogContent.additional-urls-dialog {
-    display: block;
+    display: flex;
     overflow: hidden;
+    padding: 0 1px;
+    margin: 0 -1px;
 }