Feature: Show abssolute path and open actual file in local templates

[timotheeguerin]

fix #1944
fix #1943

[codecov]

Codecov Report

Merging #1945 into master will increase coverage by <.01%.
The diff coverage is 61.53%.

@@            Coverage Diff             @@
##           master    #1945      +/-   ##
==========================================
+ Coverage   64.52%   64.53%   +<.01%     
==========================================
  Files        1009     1009              
  Lines       27532    27539       +7     
  Branches     4915     4916       +1     
==========================================
+ Hits        17766    17771       +5     
- Misses       9749     9751       +2     
  Partials       17       17

Impacted Files	Coverage Δ
...-viewer/file-too-large/file-too-large.component.ts	25.92% <0%> (ø)	⬆️
src/app/services/ncj/local-template.service.ts	70.49% <0%> (-2.39%)	⬇️
...r/image-file-viewer/image-file-viewer.component.ts	100% <100%> (ø)	⬆️
...rc/@batch-flask/ui/file/file-loader/file-loader.ts	83.33% <100%> (+1.24%)	⬆️
...file-viewer-header/file-viewer-header.component.ts	91.48% <50%> (ø)	⬆️

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