Implement clicking on tab to switch

src/layout/tile.rs

@@ -658,7 +658,9 @@ impl<W: LayoutElement> Tile<W> {
             let win_pos = self.buf_loc();
             Some(HitType::Input { win_pos })
         } else if self.is_in_activation_region(point) {
-            Some(HitType::Activate)
+            Some(HitType::Activate {
+                is_tab_indicator: false,
+            })
         } else {
             None
         }