Display link tags for LAGs more properly

[jkary]

This request contains a fix for the GitHub issue 2224. The fix focuses on the separation of labels for multiple links between the same two nodes. There appears to be the following other issues:

1. Popup labels for a link don't appear in the right place and sometimes shows the wrong link.
2. Horizontal and vertical layouts appear to have the opposite effect.

As this is my first commit, please help me understand if I am doing something wrong.

Jason

fix #2224

[hellt]

had a comment about the way it works in our discord: https://discord.com/channels/860500297297821756/1308463195047858217

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.36%. Comparing base (c06dd25) to head (99db7ca).
Report is 33 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2306      +/-   ##
==========================================
+ Coverage   51.31%   51.36%   +0.04%     
==========================================
  Files         172      172              
  Lines       16792    16838      +46     
==========================================
+ Hits         8617     8649      +32     
- Misses       7253     7264      +11     
- Partials      922      925       +3     

see 9 files with indirect coverage changes