FdoSecrets: do not share entry <-> item property by multiple unlock prompts

[Aetf]

Fixes #7753

Testing strategy

Tested manually. Existing unit tests pass.

Type of change

• ✅ Bug fix (non-breaking change that fixes an issue)

[codecov-commenter]

Codecov Report

Merging #7786 (79e6d24) into develop (7cd824a) will decrease coverage by 0.03%.
The diff coverage is 72.73%.

@@             Coverage Diff             @@
##           develop    #7786      +/-   ##
===========================================
- Coverage    64.32%   64.29%   -0.03%     
===========================================
  Files          339      339              
  Lines        43429    43430       +1     
===========================================
- Hits         27933    27921      -12     
- Misses       15496    15509      +13     

Impacted Files	Coverage Δ
src/fdosecrets/objects/Prompt.h	87.50% <ø> (ø)
src/fdosecrets/objects/Prompt.cpp	82.06% <72.73%> (-0.61%)	⬇️
...rc/fdosecrets/widgets/SettingsWidgetFdoSecrets.cpp	56.06% <0.00%> (-3.03%)	⬇️
src/fdosecrets/dbus/DBusMgr.cpp	52.20% <0.00%> (-1.47%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7cd824a...79e6d24. Read the comment docs.