Update DG for v1.4 release

[yisiox]

Fixed mistakes in class diagram for the implementation of asset.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.38%. Comparing base (9239205) to head (ee9e9a8).

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #159   +/-   ##
=========================================
  Coverage     77.38%   77.38%           
  Complexity      513      513           
=========================================
  Files            74       74           
  Lines          1605     1605           
  Branches        145      145           
=========================================
  Hits           1242     1242           
  Misses          335      335           
  Partials         28       28           

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[yisiox]

• Closes [PE-D][Tester B] Copy Command does not seem to fit well with the product #248
• Closes [PE-D][Tester D] Find flaw in the app #245
• Closes [PE-D][Tester A] Lacking a feature to add details about an asset #229
• Closes [PE-D][Tester C] Duplicate Persons checked using Name #222
• Closes [PE-D][Tester A] Difficulty in easily seeing the visual difference between Assets and Tags. #219
• Closes [PE-D][Tester B] Allow repeated entries of the same name.  #202

[yisiox]

Closes #259

[aureliony]

LGTM