I guess this would be a feature request since I don't see any way to change this behavior in the API documentation. I need an option to have the popup menu aligned to the right side of the button instead of the left (default).
If I have the button against the right side of the screen, the menu doesn't align with the button properly.

BUMP. BUMP BUMP BUMP.
Aligning the button to the right also forces the menu to wrap, which doesn't look very good:

Unlike kendo's Dropdownlist, there's no width property available for popupSettings, which I would normally set to 'auto'.
I'm running into the same problem with buttons on the right-hand side of the screen, so wanted to add a vote to have this capability added. Thanks.
Fixed in v4.4.0
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BUMP. BUMP BUMP BUMP.