misc changes to unterface & undo

- operator strings were doing undo pushes (in fileselector text for example), this is dumb since the operators themselves handle undo.
- interface code checks rna props are arrays rather then checking the array length.
- disable properties window pin undoing.
- sequencer refresh was calling undo, disable since this is clearnign global data not handled by undo.
- added commented out code for drawing mesh vertex index/key index, useful for debugging shapekey - hook issyes.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/editors/space_buttons/buttons_context.c b/source/blender/editors/space_buttons/buttons_context.c
index 8e1a4b2d16c..0d81a84deea 100644
--- a/source/blender/editors/space_buttons/buttons_context.c
+++ b/source/blender/editors/space_buttons/buttons_context.c
@@ -904,6 +904,7 @@ void buttons_context_draw(const bContext *C, uiLayout *layout)
 	block= uiLayoutGetBlock(row);
 	uiBlockSetEmboss(block, UI_EMBOSSN);
 	but= uiDefIconButBitC(block, ICONTOG, SB_PIN_CONTEXT, 0, ICON_UNPINNED, 0, 0, UI_UNIT_X, UI_UNIT_Y, &sbuts->flag, 0, 0, 0, 0, "Follow context or keep fixed datablock displayed");
+	uiButClearFlag(but, UI_BUT_UNDO); /* skip undo on screen buttons */
 	uiButSetFunc(but, pin_cb, NULL, NULL);
 
 	for(a=0; a<path->len; a++) {