Move app to external screen, contents are offset from pane

[eac-upenn]

To Reproduce

1. Open Captk in primary (internal) screen, 3840 x 2160
2. Re-size CapTk window smaller so it will fit on the external scren (I don't think this step is necessary).
3. Drag CapTk window to external 1080P screen.

Result

Interior of Captk pane is offset down from window frame.

Note that display is offset from actual GUI --- note that File is selected, but cursor (not captured by Snip) is up near the title "CaPTk". Putting the cursor near File would select Images in the tabs.

Environment

CaPTk v.1.7.3

Internal screen: 3840 x 2160, text & apps at 300% External: 1920 x 1080, 100%

OS Name Microsoft Windows 10 Home Version 10.0.18362 Build 18362

System Manufacturer HP System Model HP Spectre x360 Convertible System Type x64-based PC

Processor Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz, 2601 Mhz, 2 Core(s), 4 Logical Processor(s) BIOS Version/Date American Megatrends Inc. F.07, 14-Apr-16 SMBIOS Version 2.8 Embedded Controller Version 38.22 BIOS Mode UEFI