Minor demo improvements

egui_demo_lib/src/apps/demo/drag_and_drop.rs

@@ -111,7 +111,7 @@ impl super::Demo for DragAndDropDemo {
 
 impl super::View for DragAndDropDemo {
     fn ui(&mut self, ui: &mut Ui) {
-        ui.label("This is a proof-of-concept of drag-and-drop in egui");
+        ui.label("This is a proof-of-concept of drag-and-drop in egui.");
         ui.label("Drag items between columns.");
 
         let mut source_col_row = None;

egui_demo_lib/src/apps/demo/font_book.rs

@@ -64,7 +64,7 @@ impl super::View for FontBook {
 
         ui.horizontal(|ui| {
             ui.label("Filter:");
-            ui.text_edit_singleline(&mut self.filter);
+            ui.add(egui::TextEdit::singleline(&mut self.filter).desired_width(120.0));
             self.filter = self.filter.to_lowercase();
             if ui.button("ｘ").clicked() {
                 self.filter.clear();