Keymap: Use 1..4 to change UV select modes

Support for sync selection switching which keys apply.

source/blender/editors/uvedit/uvedit_ops.c

@@ -80,6 +80,7 @@
 
 #include "RNA_access.h"
 #include "RNA_define.h"
+#include "RNA_enum_types.h"
 
 #include "WM_api.h"
 #include "WM_types.h"
@@ -4404,6 +4405,15 @@ void ED_keymap_uvedit(wmKeyConfig *keyconf)
 	RNA_string_set(kmi->ptr, "data_path", "tool_settings.use_uv_sculpt");
 #endif
 
+	/* Select Element (Sync Select: on) */
+	ED_keymap_editmesh_elem_mode(keyconf, keymap);
+	/* Hack to prevent fall-through, when the button isn't visible. */
+	WM_keymap_add_item(keymap, "MESH_OT_select_mode", FOURKEY, KM_PRESS, 0, 0);
+	/* Select Element (Sync Select: off) */
+	WM_keymap_add_context_enum_set_items(
+	        keymap, rna_enum_mesh_select_mode_uv_items, "tool_settings.uv_select_mode",
+	        ONEKEY, KM_PRESS, 0, 0);
+
 	/* Mark edge seam */
 	WM_keymap_add_item(keymap, "UV_OT_mark_seam", EKEY, KM_PRESS, KM_CTRL, 0);