[shourisha]

That 1000px limit came from a recent regression, now fixed.

Now it makes sense finally. :-) I think this was the case why gaps appeared.

Second step would be probably to take a look at a related issue, when shrinking window with the same composite widget makes things go wrong. I simply attaching two images and you can get the idea what I am talking about. See, when I resize left part by resize bar, then my right side with my "*" input text widget simply shifts the button away off the screen. Hence I suspect this is also a bug that needs to be fixed, otherwise input widget would resize automatically, leaving my button at its place.

Thanks for the fix.

Try emulating that and post your attempt if you think you've found a bug.

Uhmm... not sure what means "try to emulate". Provide a javascript for this? Well I was done very simple thing (in Java GWT though):
1. Create a HLayout (horizontal layout) of two columns.
2. Left part can be resized.
3. Right part contains my three-column form of these two widgets.
4. Resize the left part and right part gonna screwed (see screenshot).
5. Resize the left part back as it was originally, the right part restores.

It means that "*" does not works as really expected: yes, it allows widget to grow in width, trying to fill the rest, but not really shrinks back, when asked. That's basically what I meant: only refresh will shrink it back, since you reload all the JavaScript vars and recalculate all the things from scratch, I reckon. Again, this is only with text widget (i.e. if it is e.g. Label, then everything fine). So I think text item (or base class) still has a problem re-calculating width properly.

P.S. And by the way, is there any hope to remove picture attachment width limitation in this forum? Size limit by megabytes is reasonable and should be. But browsers do image resize to view them very well nowadays. Additionally, folks is going to post a screenshots on sometimes more large resolutions to show problems etc, since this library exactly for these things...