Fix menu search referencing image menu

In this case it was called mask which wasn't correct since it's
used for image & UV's, so rename the menu instead.

release/scripts/startup/bl_ui/space_image.py

@@ -703,7 +703,7 @@ class IMAGE_HT_header(Header):
                 layout.prop(tool_settings, "uv_select_mode", text="", expand=True)
                 layout.prop(uvedit, "sticky_select_mode", icon_only=True)
 
-        MASK_MT_editor_menus.draw_collapsible(context, layout)
+        IMAGE_MT_editor_menus.draw_collapsible(context, layout)
 
         layout.separator_spacer()
 
@@ -749,8 +749,8 @@ class IMAGE_HT_header(Header):
                 row.operator("image.play_composite", icon='PLAY')
 
 
-class MASK_MT_editor_menus(Menu):
-    bl_idname = "MASK_MT_editor_menus"
+class IMAGE_MT_editor_menus(Menu):
+    bl_idname = "IMAGE_MT_editor_menus"
     bl_label = ""
 
     def draw(self, context):
@@ -1465,7 +1465,7 @@ classes = (
     IMAGE_MT_uvs_snap_pie,
     IMAGE_HT_tool_header,
     IMAGE_HT_header,
-    MASK_MT_editor_menus,
+    IMAGE_MT_editor_menus,
     IMAGE_PT_active_tool,
     IMAGE_PT_mask,
     IMAGE_PT_mask_layers,