Fix missing shortcut indicators and crash on shortcut change

Fixes T78346.

The shortcut display and change code is context sensitive. To make it
work correctly the context needs to be set properly.
When executing operators from the dropdowns, the active region is the
header, but the shortcut handlers are set for the main region. So make
sure that is used instead.

This also sets the main region active for context menu operators, where
this issue shouldn't be present. Doing it anyway shouldn't hurt though
and fixes this issue in case somebody displays the context menu in the
header as dropdown too.

release/scripts/startup/bl_ui/space_graph.py

@@ -293,7 +293,7 @@ class GRAPH_MT_key(Menu):
 
         # Using the modal operation doesn't make sense for this variant
         # as we do not have a modal mode for it, so just execute it.
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("graph.decimate", text="Decimate (Allowed Change)").mode = 'ERROR'
         layout.operator_context = operator_context
 

release/scripts/startup/bl_ui/space_node.py

@@ -433,7 +433,7 @@ class NODE_MT_context_menu(Menu):
         layout.operator("node.delete")
         layout.operator("node.clipboard_copy", text="Copy")
         layout.operator("node.clipboard_paste", text="Paste")
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
 
         layout.operator("node.delete_reconnect")
 

release/scripts/startup/bl_ui/space_view3d.py

@@ -986,7 +986,7 @@ class VIEW3D_MT_transform_base(Menu):
 
         if context.mode != 'OBJECT':
             layout.operator("transform.vertex_warp", text="Warp")
-            layout.operator_context = 'EXEC_DEFAULT'
+            layout.operator_context = 'EXEC_REGION_WIN'
             layout.operator("transform.vertex_random", text="Randomize").offset = 0.1
             layout.operator_context = 'INVOKE_REGION_WIN'
 
@@ -2058,7 +2058,7 @@ class VIEW3D_MT_edit_metaball_context_menu(Menu):
         layout.separator()
 
         # Remove
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("mball.delete_metaelems", text="Delete")
 
 
@@ -2333,7 +2333,7 @@ class VIEW3D_MT_object(Menu):
 
         layout.separator()
 
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("object.delete", text="Delete").use_global = False
         layout.operator("object.delete", text="Delete Global").use_global = True
 
@@ -2597,7 +2597,7 @@ class VIEW3D_MT_object_context_menu(Menu):
 
         layout.separator()
 
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("object.delete", text="Delete").use_global = False
 
 
@@ -2683,7 +2683,7 @@ class VIEW3D_MT_object_parent(Menu):
 
         layout.separator()
 
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("object.parent_no_inverse_set")
         layout.operator_context = operator_context_default
 
@@ -2774,7 +2774,7 @@ class VIEW3D_MT_make_single_user(Menu):
 
     def draw(self, _context):
         layout = self.layout
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
 
         props = layout.operator("object.make_single_user", text="Object")
         props.object = True
@@ -3714,7 +3714,7 @@ class VIEW3D_MT_edit_mesh_context_menu(Menu):
             col.operator("transform.shrink_fatten", text="Shrink/Fatten")
             col.operator("transform.shear", text="Shear")
             col.operator("transform.vert_slide", text="Slide Vertices")
-            col.operator_context = 'EXEC_DEFAULT'
+            col.operator_context = 'EXEC_REGION_WIN'
             col.operator("transform.vertex_random", text="Randomize Vertices").offset = 0.1
             col.operator("mesh.vertices_smooth", text="Smooth Vertices").factor = 0.5
             col.operator_context = 'INVOKE_REGION_WIN'
@@ -3941,7 +3941,7 @@ class VIEW3D_MT_edit_mesh_vertices(Menu):
         layout.separator()
 
         layout.operator("transform.vert_slide", text="Slide Vertices")
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("mesh.vertices_smooth", text="Smooth Vertices").factor = 0.5
         layout.operator("mesh.vertices_smooth_laplacian", text="Smooth Vertices (Laplacian)")
         layout.operator_context = 'INVOKE_REGION_WIN'
@@ -4195,7 +4195,7 @@ class VIEW3D_MT_edit_mesh_normals(Menu):
         layout.operator_context = 'INVOKE_REGION_WIN'
         layout.operator("transform.rotate_normal", text="Rotate...")
         layout.operator("mesh.point_normals", text="Point to Target...")
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
 
         layout.operator("mesh.merge_normals", text="Merge")
         layout.operator("mesh.split_normals", text="Split")
@@ -4662,7 +4662,7 @@ class VIEW3D_MT_edit_meta(Menu):
 
         layout.menu("VIEW3D_MT_edit_meta_showhide")
 
-        layout.operator_context = 'EXEC_DEFAULT'
+        layout.operator_context = 'EXEC_REGION_WIN'
         layout.operator("mball.delete_metaelems", text="Delete")