bugfix/KBDEV-1270 Error handling when expanding graph view failed

[sshugsc]

KBDEV-1270

• check for deleted edge to avoid undefined error

[github-actions]

Unit Test Results

    1 files  ±0    39 suites  ±0   1m 36s ⏱️ -3s
160 tests ±0  159 ✔️ ±0  1 💤 ±0  0 ❌ ±0 
156 runs  ±0  155 ✔️ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit 04b1d9d. ± Comparison against base commit c9e1d05.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.76%. Comparing base (c9e1d05) to head (04b1d9d).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #96   +/-   ##
========================================
  Coverage    56.76%   56.76%           
========================================
  Files          102      102           
  Lines         3874     3874           
  Branches      1310     1247   -63     
========================================
  Hits          2199     2199           
- Misses        1663     1666    +3     
+ Partials        12        9    -3     

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