Text Display Improvements

[Gold872]

• Automatically enable submit button if the topic is persistent
• Show red underline if value has not been published

Resolves #174

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.01%. Comparing base (31bf9ac) to head (d50e5ff).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #175      +/-   ##
==========================================
+ Coverage   75.98%   76.01%   +0.03%     
==========================================
  Files          80       80              
  Lines        8461     8472      +11     
==========================================
+ Hits         6429     6440      +11     
  Misses       2032     2032              

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