First reported there, incl. screenshots.
https://bugs.launchpad.net/ubuntu/+source/gnome-utils/+bug/911862

## Example truncated-1
Open gcalctool, enable advanced mode.
It starts with 'Degrees' on left drop-down button.
We want to make a screenshot incl. context menu: Temperature -> Celsius
## the dialog opens downwards.

Open gnome-screenshot via GUI or cli:
gnome-screenshot -w --delay=10

Return to gcalctool, select from drop-down list: Temperature -> Celsius
Result of screenshot: Celsius isn't displayed, the dialog window is truncated.

## Example truncated-2
Open gcalctool, enable advanced mode.
Instead of 'Degrees' select 'Currency' -> US-Dollar from drop-down list.
We want to make a screenshot incl. context menu: Temperature -> Celsius
## the dialog opens upwards.

Open gnome-screenshot via GUI or cli:
gnome-screenshot -w --delay=10

Return to gcalctool, select from list: Temperature -> Celsius
Result of screenshot: Celsius is displayed, the rest of dialog window is truncated.

Expected:
Don't truncate screenshots under different conditions.

## Terminal output:
~$ gnome-screenshot -w --delay=10
** (gnome-screenshot:6996): DEBUG: The GetProfileForWindow request failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.ColorManager was not provided by any .service files