fix(edition): remove placeholder for now available sources

[musicEnfanthen]

This PR removes placeholder from textcritics and source lists in op12 and op25. The targeted sources are now available.

[musicEnfanthen]

ref.openModal('OP12_SOURCE_NOT_AVAILABLE') --> ref.navigateToReportFragment('source_XYZ')

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.56%. Comparing base (e4d8aba) to head (67ca2b3).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1529   +/-   ##
========================================
  Coverage    77.56%   77.56%           
========================================
  Files          245      245           
  Lines         4008     4008           
  Branches       615      615           
========================================
  Hits          3109     3109           
  Misses         880      880           
  Partials        19       19           

Flag	Coverage Δ
unittests	77.56% <ø> (ø)

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[masthom]

👍