[Bug] controlling the scroller via `set_vscroll_position` does not work for Column elements

Type of Issue (Enhancement, Error, Bug, Question)

Bug

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Operating System

windows 10

PySimpleGUI Port (tkinter, Qt, Wx, Web)

tkinter

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Versions

Version information can be obtained by calling sg.main_get_debug_data()
Or you can print each version shown in ()

Python version (sg.sys.version)

3.8.1

PySimpleGUI Version (sg.__version__)

4.28.0

GUI Version (tkinter (sg.tclversion_detailed), PySide2, WxPython, Remi)

None

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Your Experience In Months or Years (optional)

2 Years Python programming experience

5 Years Programming experience overall

None Have used another Python GUI Framework? (tkinter, Qt, etc) (yes/no is fine)

Anything else you think would be helpful?

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Troubleshooting

These items may solve your problem. Please check those you've done by changing - [ ] to - [X]

• Searched main docs for your problem www.PySimpleGUI.org
• Looked for Demo Programs that are similar to your goal Demos.PySimpleGUI.org
• If not tkinter - looked for Demo Programs for specific port
• For non tkinter - Looked at readme for your specific port if not PySimpleGUI (Qt, WX, Remi)
• Run your program outside of your debugger (from a command line)
• Searched through Issues (open and closed) to see if already reported Issues.PySimpleGUI.org
• Tried using the PySimpleGUI.py file on GitHub. Your problem may have already been fixed but not released

Detailed Description

I'm trying to use the set_vscroll_position() in order to ease the user navigation in a column containing lots of rows full with input boxes but it keeps firing the following warnings and does not work:
Warning setting the vertical scroll (yview_moveto failed)
'TkScrollableFrame' object has no attribute 'yview_moveto'

My Code
This program is creating a window which contains a column that has a pre determined layout containing all the mentioned input boxes and a pre determined sizes.

in addition there are the discussed buttons inside.

Code To Duplicate

form = sg.Window('analysis').Layout([
				[sg.Column(layout, size=(width / 3, height / 2), scrollable=True, key = "Column")], 
				[sg.OK(), sg.Button('Up', key = "up"), sg.Button('Down', key = "down")]
				])


while True:
	event, values = form.read()
	
	if(event == sg.WIN_CLOSED):
		break
	elif(event == "down"):
		form.Element('Column').set_vscroll_position(1.0)
	elif(event == "up"):
		form.Element('Column').set_vscroll_position(0.0)

Screenshot, Sketch, or Drawing

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Watcha Makin?

If you care to share something about your project, it would be awesome to hear what you're building.

Bắt đầu bằng cách tái hiện vấn đề với bố cục Column được cung cấp và kiểm tra set_vscroll_position cùng với đường dẫn cảnh báo của TkScrollableFrame. Công việc được xem là hoàn tất khi các nút lên và xuống di chuyển Column có thể cuộn đến các vị trí được yêu cầu mà không có cảnh báo yview_moveto.