clearer menu titles in exp

exp/dtkWidgetsMenu/parameters_definition.json

@@ -165,7 +165,7 @@
 
 
         "button_hiding":{
-            "label": "Toggle the spinbox",
+            "label": "Click on <Run> to hide/unhide a spinbox",
             "doc": "It's a button",
             "type": "dtk::d_bool"
         },

exp/dtkWidgetsMenu/parameters_menu.json

@@ -154,7 +154,7 @@
                         }
                     }
                 ],
-                "uid": "Parameters",
+                "uid": "Normal Parameters",
                 "advanced": false,
                 "icon": "cog"
             }
@@ -177,7 +177,7 @@
                         }
                     }
                 ],
-                "uid": "More actions",
+                "uid": "Hide/Unhide a menu entry",
                 "advanced": false,
                 "icon": "cog"
             }