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/buttons_editing.c

@@ -925,7 +925,7 @@ static void draw_modifier(uiBlock *block, Object *ob, ModifierData *md, int *xco
 	
 	if (isVirtual) {
 		sprintf(str, "%s (virtual)", md->name);
-		uiDefBut(block, LABEL, 0, str, x+10, y-1, buttonWidth-60, 19, NULL, 0.0, 0.0, 0.0, 0.0, "Modifier name"); 
+		uiDefBut(block, LABEL, 0, str, x+10, y-1, width-90, 19, NULL, 0.0, 0.0, 0.0, 0.0, "Modifier name"); 
 
 		uiClearButLock();