A couple of smaller fixes;

- Modifier Panel, name label for "Virtual" modifiers was too short
- On extrude Bones, "soft distance" now is always set based on length
  of the bone (also on CTRL+click, also when Envelope drawmode is not set)
- Added undo-push for "Apply Bone Envelopees to VertexGroup" in WeightPaint.
- Menu-buttons in floating panels sometimes gave drawing error
- InfoWindow buttons were always allocated & drawn, even when window was
  zero sized... waste of cpu, tsk!

source/blender/src/transform_conversions.c

@@ -552,7 +552,7 @@ static void createTransArmatureVerts(TransInfo *t)
 	
 	for (ebo=G.edbo.first;ebo;ebo=ebo->next){
 		
-		ebo->oldlength= ebo->length;	// might be used for scaling
+		ebo->oldlength= ebo->length;	// length==0.0 on extrude, used for scaling radius of bone points
 		
 		if (t->mode==TFM_BONE_ENVELOPE) {