style(app): текст в выборе скоупа по центру ячейки

app/lib/core/widgets/scope_selector.dart

@@ -34,6 +34,9 @@ class ScopeSelector extends ConsumerWidget {
               for (final s in rows)
                 DropdownMenuItem(
                   value: s.scope,
+                  // the button is as wide as the longest name; a shorter one would sit at its
+                  // left edge otherwise
+                  alignment: Alignment.center,
                   child: Text(s.name, overflow: TextOverflow.ellipsis),
                 ),
             ],