Combobox menus open in wrong position on change from financial mode to advanced mode

[lukefromdc]

Expected behaviour

All combobox menus open over their buttons

Actual behaviour

If a combobox is opened in financial mode and the mode then switched to advanced mode, comboboxes can open in arbitrary locations detached from their buttons. See #55 (comment)
and video posted there
https://www.dropbox.com/s/jf8axx21u4xlhi3/mate-calc.ogv.tar.xz?dl=0

Steps to reproduce the behaviour

Open mate-calc and switch to financial mode. Click on one of the two comboboxes. Now switch to Advanced mode and click on the same combobox, which now has a new label but about the same position. The menu opens in the wrong place.

MATE general version

1.21/1.20 mix from git master

Package version

locally compiled

Linux Distribution

Debian Unstable

Link to downstream report of your Distribution

None as this is a local build

[vkareh]

Yep, I can see this as well

Seems to always show up at the very top of the current screen