Cleanup: correct unbalanced doxygen groups

Also add groups in some files.

source/blender/python/intern/bpy_app_translations.c

@@ -69,12 +69,12 @@ static BlenderAppTranslations *_translations = NULL;
 
 /** \} */
 
-#ifdef WITH_INTERNATIONAL
-
 /* ------------------------------------------------------------------- */
 /** \name Helpers for GHash
  * \{ */
 
+#ifdef WITH_INTERNATIONAL
+
 typedef struct GHashKey {
   const char *msgctxt;
   const char *msgid;

source/blender/python/intern/bpy_props.c

@@ -434,6 +434,10 @@ static PyObject *bpy_prop_deferred_data_CreatePyObject(PyObject *fn, PyObject *k
 
 /** \} */
 
+/* -------------------------------------------------------------------- */
+/** \name Shared Property Utilities
+ * \{ */
+
 /* PyObject's */
 static PyObject *pymeth_BoolProperty = NULL;
 static PyObject *pymeth_BoolVectorProperty = NULL;