This is such a cool idea & I agree, I use the notepad aswell alot and I can tell you that this would be a great addition..

Voted yes of course.

@yes

Bump

Yes.

Bump

Voted yes.

Bump

Voted yes

Bump

Personally suggested this a while back but it got no traction so i ditched it.
With the addition of tabs I really think the actual notepad box should be larger.
while it extends to the right it does not extend downward for larger monitors which leaves a lot of wasted space.