Problem of .mlx Dropdown?

Hi, guys. I am here for asking help.

I use .mlx, and found that very attractive, so I use them a lot. Especially with dropdown.

However for certain case, dropdown does not work properly.

For me, when creating the dropdown, I copy(Ctrl+c after clicking column) from data from variable in the workspace. and paste them to drop down list. See below image.

These works well, when data is not spaced like below;

a(1,:)="abcdefghijklmnoprstuvwxyz"
a(2,:)="ABCDEFGHIJKLMNOPQRSTUVWXYZ"

This created 2 queries, this is okay.

However when data is spaced like this;

a(1,:)="abcdefghijkl mnoprstuvwxyz"
a(2,:)="ABCDEFGHIJK LMNOPQRSTUVWXYZ"

this makes 4 queries, when paste to dropdown.

From my guess, dropdown acknowledge the space as a linebreak...?

So anyway, what I need is to create 2 queries with spaced data.

How can I do it? I found that function which name is 'uidropdown'... but it looks like this is for dropdown for 'figure', not the .mlx code.

Thank you very much.