Fix node selection not working on graph node text labels (#8394)

### What

This fixes a bug where specifically, selecting nodes via text labels was
not working. We encountered this bug during our work on #8390.

### How to test

To test open the `+main` manifest in the web viewer (link in bot message
below), select the graph lattice example and try clicking on nodes.

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crates/viewer/re_view_graph/src/ui/draw.rs

@@ -94,7 +94,7 @@ fn draw_circle_label(
     let &CircleLabel { radius, color } = label;
     let visuals = &ui.style().visuals.clone();
 
-    let (resp, painter) = ui.allocate_painter(Vec2::splat(radius * 2.0), Sense::click());
+    let (resp, painter) = ui.allocate_painter(Vec2::splat(radius * 2.0), Sense::hover());
     painter.circle(
         resp.rect.center(),
         radius,
@@ -132,13 +132,9 @@ fn draw_text_label(ui: &mut Ui, label: &TextLabel, highlight: InteractionHighlig
         .stroke(stroke)
         .fill(bg)
         .show(ui, |ui| {
-            ui.add(
-                egui::Label::new(galley.clone())
-                    .selectable(false)
-                    .sense(Sense::click()),
-            )
+            ui.add(egui::Label::new(galley.clone()).selectable(false))
         })
-        .response
+        .inner
 }
 
 /// Draws a node at the given position.
@@ -148,15 +144,18 @@ fn draw_node(
     node: &DrawableLabel,
     highlight: InteractionHighlight,
 ) -> Response {
-    let builder = UiBuilder::new().max_rect(Rect::from_center_size(center, node.size()));
-    let mut node_ui = ui.new_child(builder);
+    let builder = UiBuilder::new()
+        .max_rect(Rect::from_center_size(center, node.size()))
+        .sense(Sense::click());
 
-    // TODO(grtlr): handle highlights
+    let mut node_ui = ui.new_child(builder);
 
     match node {
         DrawableLabel::Circle(label) => draw_circle_label(&mut node_ui, label, highlight),
         DrawableLabel::Text(label) => draw_text_label(&mut node_ui, label, highlight),
-    }
+    };
+
+    node_ui.response()
 }
 
 /// Draws a bounding box, as well as a basic coordinate system.