Drawing Sheet Editor Save As actually does a Save Copy As

Description

In "Drawing Sheet Editor" File -> Save As... current behavior: Saves the current file in new name and keeps editing the current one. expected behavior: Saves the current file in new name and edits the new one.

Steps to reproduce

KiCad Version

Application: KiCad Drawing Sheet Editor x64 on x64

Version: (7.0.0), release build

Libraries:
	wxWidgets 3.2.1
	FreeType 2.12.1
	HarfBuzz 5.0.1
	FontConfig 2.14.1

Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.2.1 (wchar_t,wx containers)
	Boost: 1.80.0
	OCC: 7.6.2
	Curl: 7.83.1-DEV
	ngspice: 39
	Compiler: Visual C++ 1934 without C++ ABI

Build settings:
	KICAD_SPICE=ON