[crmsh-5.0] Dev: ui_sbd: Check if crashdump is configured before purging crashdump options

[liangxin1300]

Backport from #1963

[codecov]

Codecov Report

❌ Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.77%. Comparing base (43a7e14) to head (91f00cd).
⚠️ Report is 17 commits behind head on crmsh-5.0.

Files with missing lines	Patch %	Lines
crmsh/ui_sbd.py	16.66%	5 Missing ⚠️

Additional details and impacted files

Flag	Coverage Δ
integration	55.24% <16.66%> (-0.01%)	⬇️
unit	52.97% <16.66%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
crmsh/ui_sbd.py	83.81% <16.66%> (-0.84%)	⬇️

... and 1 file with indirect coverage changes

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