Problem with clearing of selected cells

Requirements

• I searched through the issues if the issue already exists

Steps to reproduce

1. Enter data in the spreadsheet
2. Select cells in the order of bottom to up
3. Clear the selected content ( Using Delete key or selection->clear content )

Expected

Selected content should be cleared

Observed

Selected content is not cleared

Labplot Version

Debug build 2.10.0-793-g45d671b7e
Sep 3 2023, 03:54:15
System: KDE neon 5.27
Locale: English,India (Decimal point '.', Group separator ','
Number settings: Decimal point '.', Group separator ',', Exponential 'e', Zero digit '0', Percent '%', Positive/Negative sign '+'/'-' (Updated on restart)
Architecture: x86_64-little_endian-lp64
Kernel: linux 6.2.0-31-generic
C++ Compiler: GNU 11.4.0
C++ Compiler Flags: -pipe -fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align -Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef -Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Werror=init-self -Wvla -Wdate-time -Wsuggest-override -Wlogical-op -fdiagnostics-color=always -Wall -Wextra -Wundef -Wpointer-arith -Wunreachable-code -Wunused -Wdeprecated-declarations -fno-omit-frame-pointer -fstack-protector -fexceptions -std=c++17 -O2 -Wcast-align -Wswitch-enum -fvisibility=default -pedantic -Wzero-as-null-pointer-constant