Placing Design block doesnt update power symbol reference
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# Description
When a design block is placed, references are updated to prevent duplication. However this is not happening with power symbol references. This is especially confusing as the power symbol references are hidden.
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# Steps to reproduce
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1. Place two of the same design block in the schematic
2. Check two corresponding power symbols and you will see that they have the same reference.
[KiCad.mkv](/uploads/62e42a54aba7e4b2b3768a4e4265f650/KiCad.mkv)
# KiCad Version
```
Application: KiCad Schematic Editor x64 on x64
Version: 10.0.0, release build
Libraries:
wxWidgets 3.3.2
FreeType 2.13.3
HarfBuzz 12.3.0
FontConfig 2.17.1
libcurl/8.18.0 Schannel zlib/1.3.1
Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW
OpenGL: NVIDIA Corporation, NVIDIA GeForce GTX 970/PCIe/SSE2, 4.6.0 NVIDIA 560.94
Build Info:
Date: Mar 19 2026 23:22:59
wxWidgets: 3.3.2 (wchar_t,STL containers)
Boost: 1.90.0
OCC: 7.9.2
Curl: 8.18.0
ngspice: 45.2
Compiler: Visual C++ 1944 without C++ ABI
KICAD_IPC_API=ON
KICAD_USE_PCH=OFF
Locale:
Lang: en_GB
Enc: UTF-8
Num: 1,234.5
Encoded кΩ丈: D0BACEA9E4B888 (sys), D0BACEA9E4B888 (utf8)
```
issue