add display Q-beam angle in view and presenter

[KyleQianliMa]

Short description of the changes:

Long description of the changes:

Check list for the pull request

• I have read the [CONTRIBUTING]
• I have read the [CODE_OF_CONDUCT]
• I have added tests for my changes
• I have updated the documentation accordingly

Check list for the reviewer

• I have read the [CONTRIBUTING]
• I have verified the proposed changes
• best software practices
  • all internal functions have an underbar, as is python standard
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

Manual test for the reviewer

References

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.56%. Comparing base (e0e8bea) to head (51599c4).

Additional details and impacted files

@@            Coverage Diff             @@
##             next      #45      +/-   ##
==========================================
+ Coverage   98.53%   98.56%   +0.03%     
==========================================
  Files          10       10              
  Lines         819      837      +18     
==========================================
+ Hits          807      825      +18     
  Misses         12       12              

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