fix board selection and workspace input dialogs width and height (#1406)

* fix board selection and workspace input dialogs width and height

* use same dialog for new file and rename

* fix board list getting small when filtering

* board select dialog: show variant text when no board is found

* fix addition boards url outline

arduino-ide-extension/src/browser/theia/workspace/workspace-input-dialog.ts

@@ -18,6 +18,7 @@ export class WorkspaceInputDialog extends TheiaWorkspaceInputDialog {
     protected override readonly labelProvider: LabelProvider
   ) {
     super(props, labelProvider);
+    this.node.classList.add('workspace-input-dialog');
     this.appendCloseButton(
       nls.localize('vscode/issueMainService/cancel', 'Cancel')
     );