I18n: systematically tag all messages in `RNA_ENUM_ITEM_HEADING`.

Add missing labels, and also add tooltips.

Unfortunately there is no way currently to extract two messages from a
single 'function' call, so unless those type of macros become very
widely used, would keep it as manual tagging.

Also disambiguate `case` in text context, pretty sure English is one of
the very rare languages to use this word for character case too.

2 files changed, 9 insertions, 10 deletions

diff --git a/source/blender/editors/gpencil/gpencil_interpolate.c b/source/blender/editors/gpencil/gpencil_interpolate.c
index 94afc36f5ee..bf6616638c4 100644
--- a/source/blender/editors/gpencil/gpencil_interpolate.c
+++ b/source/blender/editors/gpencil/gpencil_interpolate.c
@@ -1484,7 +1484,7 @@ void GPENCIL_OT_interpolate_sequence(wmOperatorType *ot)
   static const EnumPropertyItem gpencil_interpolation_type_items[] = {
       /* Interpolation. */
       RNA_ENUM_ITEM_HEADING(CTX_N_(BLT_I18NCONTEXT_ID_GPENCIL, "Interpolation"),
-                            "Standard transitions between keyframes"),
+                            N_("Standard transitions between keyframes")),
       {GP_IPO_LINEAR,
        "LINEAR",
        ICON_IPO_LINEAR,
@@ -1497,10 +1497,9 @@ void GPENCIL_OT_interpolate_sequence(wmOperatorType *ot)
        "Custom interpolation defined using a curve map"},
 
       /* Easing. */
-      RNA_ENUM_ITEM_HEADING(CTX_N_(BLT_I18NCONTEXT_ID_GPENCIL,
-                                   "Easing (by strength)"),
-                            "Predefined inertial transitions, useful for motion graphics "
-                            "(from least to most \"dramatic\")"),
+      RNA_ENUM_ITEM_HEADING(CTX_N_(BLT_I18NCONTEXT_ID_GPENCIL, "Easing (by strength)"),
+                            N_("Predefined inertial transitions, useful for motion graphics "
+                               "(from least to most \"dramatic\")")),
       {GP_IPO_SINE,
        "SINE",
        ICON_IPO_SINE,
@@ -1518,7 +1517,7 @@ void GPENCIL_OT_interpolate_sequence(wmOperatorType *ot)
        "Circular easing (strongest and most dynamic)"},
 
       RNA_ENUM_ITEM_HEADING(CTX_N_(BLT_I18NCONTEXT_ID_GPENCIL, "Dynamic Effects"),
-                            "Simple physics-inspired easing effects"),
+                            N_("Simple physics-inspired easing effects")),
       {GP_IPO_BACK, "BACK", ICON_IPO_BACK, "Back", "Cubic easing with overshoot and settle"},
       {GP_IPO_BOUNCE,
        "BOUNCE",
diff --git a/source/blender/editors/object/object_data_transfer.c b/source/blender/editors/object/object_data_transfer.c
index 4837b538bf6..78b059d5514 100644
--- a/source/blender/editors/object/object_data_transfer.c
+++ b/source/blender/editors/object/object_data_transfer.c
@@ -45,7 +45,7 @@
  * Note some are 'fake' ones, i.e. they are not hold by real CDLayers. */
 /* Not shared with modifier, since we use a usual enum here, not a multi-choice one. */
 static const EnumPropertyItem DT_layer_items[] = {
-    RNA_ENUM_ITEM_HEADING("Vertex Data", NULL),
+    RNA_ENUM_ITEM_HEADING(N_("Vertex Data"), NULL),
     {DT_TYPE_MDEFORMVERT,
      "VGROUP_WEIGHTS",
      0,
@@ -61,7 +61,7 @@ static const EnumPropertyItem DT_layer_items[] = {
 #endif
     {DT_TYPE_BWEIGHT_VERT, "BEVEL_WEIGHT_VERT", 0, "Bevel Weight", "Transfer bevel weights"},
 
-    RNA_ENUM_ITEM_HEADING("Edge Data", NULL),
+    RNA_ENUM_ITEM_HEADING(N_("Edge Data"), NULL),
     {DT_TYPE_SHARP_EDGE, "SHARP_EDGE", 0, "Sharp", "Transfer sharp mark"},
     {DT_TYPE_SEAM, "SEAM", 0, "UV Seam", "Transfer UV seam mark"},
     {DT_TYPE_CREASE, "CREASE", 0, "Subdivision Crease", "Transfer crease values"},
@@ -72,12 +72,12 @@ static const EnumPropertyItem DT_layer_items[] = {
      "Freestyle Mark",
      "Transfer Freestyle edge mark"},
 
-    RNA_ENUM_ITEM_HEADING("Face Corner Data", NULL),
+    RNA_ENUM_ITEM_HEADING(N_("Face Corner Data"), NULL),
     {DT_TYPE_LNOR, "CUSTOM_NORMAL", 0, "Custom Normals", "Transfer custom normals"},
     {DT_TYPE_MPROPCOL_LOOP | DT_TYPE_MLOOPCOL_LOOP, "VCOL", 0, "Colors", "Color Attributes"},
     {DT_TYPE_UV, "UV", 0, "UVs", "Transfer UV layers"},
 
-    RNA_ENUM_ITEM_HEADING("Face Data", NULL),
+    RNA_ENUM_ITEM_HEADING(N_("Face Data"), NULL),
     {DT_TYPE_SHARP_FACE, "SMOOTH", 0, "Smooth", "Transfer flat/smooth mark"},
     {DT_TYPE_FREESTYLE_FACE,
      "FREESTYLE_FACE",