PCBNEW: It does not remember the drawing sheet settings from Embedded Files.

Description

If in the "Page Settings" window in the "File:" field I set the embedded reference of the drawing sheet from the embedded files from the "Board Setup" window, then after closing the entire Kicad and restarting it, the set drawing sheet will not be displayed. I have to overwrite the set embedded reference in the "File:" field with the same text in order for the drawing sheet to be displayed. It works correctly in the schematic editor.

Steps to reproduce

KiCad Version

Application: KiCad x64 on x64

Version: 9.0.0-rc1-82-gaf8ad6651a, release build

Libraries:
	wxWidgets 3.2.6
	FreeType 2.13.3
	HarfBuzz 10.0.1
	FontConfig 2.15.0

Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW
OpenGL: NVIDIA Corporation, NVIDIA GeForce RTX 3060 Laptop GPU/PCIe/SSE2, 4.6.0 NVIDIA 527.99

	wxWidgets: 3.2.6 (wchar_t,wx containers)
	Boost: 1.86.0
	OCC: 7.8.1
	Curl: 8.10.1-DEV
	ngspice: 43
	Compiler: Visual C++ 1942 without C++ ABI
	KICAD_IPC_API=ON

Locale: 
	Lang: en_GB
	Enc: UTF-8
	Num: 1,234.5
	Encoded кΩ丈: D0BACEA9E4B888 (sys), D0BACEA9E4B888 (utf8)